Programming in C Lab.
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Part-A
Program No. 1:
Write a C program to read radius of a circle and to find area and circumference.
Source Code:
/* C-Program Area and Circumference of Circle */
#include <stdio.h>
int main()
{
float r,area, circum;
printf("Enter the Radius of circle: \n");
scanf("%f", &r);
area = 22/7.0*r*r;
circum = 2*22/7.0*r;
printf("\n");
printf("Area = %7.2f \n", area);
printf("circum = %7.2f \n", circum);
return 0;
}
Output
1.
Enter the Radius of circle:
7
Area = 154.00
circum = 44.00
2. Enter the Radius of circle:
13.6
Area = 581.30
circum = 85.49
Program No. 2:
Write a C program to read three numbers and find the biggest of three.
Source Code:
/* Read any three real numbers and find largest number using nested if */
#include <stdio.h>
#include <conio.h>
int main()
{
float a, b, c, l;
printf("Enter Any three Numbers (a, b, c): \n");
scanf("%f%f%f", &a,&b,&c);
if(a > b) /* nested if */
if(a > c)
l = a;
else
l = c;
else if(b > c) /* else if ladder */
l = b;
else
l = c;
printf("\nLargest Number = %.2f\n",l);
return 0;
}
Output:
1.
Enter Any three Numbers (a, b, c):
45
25
89
Largest Number = 89
2.Enter Any three Numbers (a, b, c):
-45.98
-892.00
-23.67
Largest Number = -23.67
Program No. 3:
Write a C program to demonstrate library functions in math.h.
Source Code:
/* Program to demonstrate library function in math.h */
/* use of pow(), sqrt(), fabs(), fmod(), cos(), log(), log10(), ceil() functions */
#define PI 3.14159265
#include<stdio.h>
#include<math.h>
int main()
{ int a = 25, b = -40;
float x = 15.5, y = 4.3;
double d, ret, val;
/* the use of pow ()function */
printf("Value a^ 3 = %lf\n", pow(a, 3));
printf("Value x ^ 1.98 = %lf\n", pow(x, 1.98));
/* the use of sqrt() function */
printf("\nSquare root of %d is %lf\n", a,sqrt(a));
printf("Square root of %f is %f\n", x,sqrt(x));
/* the use of ceil() function returns the smallest integer value greater than or equal to x */
printf("\nvalue of x = %.1lf\n", ceil(x));
printf("value of y = %.1lf\n", ceil(y));
/* the use of fabs() function, returns the absolute value */
printf("\nThe absolute value of y-x is: %f\n", fabs(y-x));
printf("The absolute value of %d is %lf\n", b, fabs(b));
/* the use of fmod() function returns the remainder of x divided by y */
printf("\nRemainder of %f / %f is %lf\n", x, y,fmod(x, y));
/* the use of log() (base-e logarithm) and log10() (base-10) function */
printf("\nlog(%lf) = %lf\n", x, log(x));
printf("log10(%lf) = %lf\n", x, log10(x));
/*the use of cos function returns the cosine of a radian angle x */
d = 60.0;
val = PI / 180.0;
ret = cos(d * val);
printf("\nThe cosine of %lf is %lf degrees\n", d, ret);
return (0);
}
Output:
Program No. 4:
Write a C Program to read any integer number and Check for Prime number
Source Code:
/* Program to read any integer number and Check for Prime number */
#include<stdio.h>
#include<math.h>
int main()
{
int n, flag, s, i;
printf("Enter an integer number: ");
scanf("%d",&n);
s=sqrt(n);
flag=0;
for(i=2;i<=s;i++)
if(n%i==0)
{
flag = 1;
break;
}
if(flag == 0)
printf("%d is prime number\n", n);
else
printf("%d is not prime number\n", n);
return (0);
}
Program No. 5:
Write a C Program to generate N Prime numbers from beginning
Source Code:
/* Program to Generate N Prime numbers from beginning */
#include<stdio.h>
#include<math.h>
int main()
{
int n, flag, s, i,t,c;
printf("Enter how many numbers generate prime: ");
scanf("%d",&t);
c = 0; /* c for count */
n = 2; /* starting number */
while( c <= t)
{
s=sqrt(n);
flag=0;
for(i=2;i<=s;i++)
if(n%i==0)
{
flag = 1;
break;
}
if(flag == 0)
{
printf("%5d", n);
c++;
}
n++;
}
return (0);
}
Program No. 6:
Write a C Program to read an integer number find sum of digits, reverse number and check it for palindrome
Source Code:
/* Program to read an integer number find sum of digits, reverse number and check it for palindrome */
#include<stdio.h>
int main()
{
long int n, rev, temp;
int d, sum;
printf("Enter an integer number: ");
scanf("%ld",&n);
temp = n;
rev = 0;
sum = 0;
while( n != 0)
{
d = n % 10;
sum += d;
rev = rev * 10 + d;
n /= 10;
}
printf("The original Number: %ld\n",temp);
printf("Sum of digits = %d of %ld\n",sum,temp);
printf("Reverse number = %ld of %ld\n",rev,temp);
/* check for palindrom */
if(rev == temp)
printf("The number %ld is palindrome\n",temp);
else
printf("The number %ld is NOT palindrome\n",temp);
return (0);
}
Program No. 7:
Write a C Program to read numbers from keyboard continuously till the user press 999 and to find the sum of only positive integer numbers
Source Code:
/* Program to read numbers from keyboard continuously till the user press 999 and
to find the sum of only positive integer numbers */
#include<stdio.h>
int main()
{
int n, sum =0;
printf("Enter 999 to end this process:\n");
start:
printf("Enter an integer number: ");
scanf("%d",&n);
if (n == 999)
goto output;
if (n > 0)
sum = sum + n;
goto start;
output:
printf("Sum of all positive numbers = %d\n",sum);
return (0);
}
Program No. 8:
Write a C Program to read percentage of marks and to display appropriate message (demonstration of else if ladder)
Source Code:
/* Program to read percentage of marks and to display appropriate message (demonstration of else if ladder) */
#include<stdio.h>
int main()
{
float p_marks;
printf("Enter percentage of Marks: ");
scanf("%f",&p_marks);
if (p_marks > 100 || p_marks < 0)
printf("Invalid Percentage marks\n");
else if (p_marks >= 85 )
printf("you got outstanding O grade \n");
else if (p_marks >= 75 )
printf("you got A grade \n");
else if (p_marks >= 65 )
printf("you got B grade \n");
else if (p_marks >= 55 )
printf("you got C grade \n");
else if (p_marks >= 50 )
printf("you got D grade \n");
else
printf("you got F (fail) grade \n");
return (0);
}
Program No. 9:
Write a C program to find the roots of quadratic equation (Demonstration of switch case statement).
Source Code:
/* Roots of Quadratic Equaction using swich case statement */
#include<stdio.h>
#include<math.h>
int main()
{
float a, b, c, d, x1, x2;
int opt;
printf("Enter the values of a, b, c \n");
scanf("%f%f%f", &a, &b, &c);
d = b*b-4*a*c;
/* select options */
opt = d > 0 ? 1: d < 0 ? -1 : 0;
switch(opt)
{
case -1:
printf("Roots are Imaginary \nThere is no solution\n");
break;
case 0:
printf("Roots are Equal \n");
x1 = x2 = -b/(2*a);
printf("Root1 (x1) = %7.2f\n",x1);
printf("Root2 (x2) = %7.2f\n",x2);
break;
default:
printf("Roots are Real and different type \n");
x1 = (-b + sqrt(d))/(2*a);
x2 = (-b - sqrt(d))/(2*a);
printf("Root1 (x1) = %7.2f\n",x1);
printf("Root2 (x2) = %7.2f\n",x2);
break;
}
return 0;
}
Program No. 10:
Write a C Program to read marks scored by n students and find the average of marks (Demonstration of single dimensional array
Source Code:
/* Program to read marks scored by n students and find the average of marks
(Demonstration of single dimensional array */
#include <stdio.h>
int main ()
{
int marks[50], i, n,sum;
float avg;
printf ("Enter the Total students in a class:\n");
scanf ("%d",&n);
printf ("Enter %d students marks: \n", n);
for (i=0; i<n; i++)
scanf ("%d",&marks[i]);
/* average marks */
sum = 0;
for (i = 0; i < n; i++)
sum += marks[i];
avg = sum/(float)n;
printf ("\nstudents Marks list is :\n");
for (i = 0; i < n; i++)
printf ("%5d", marks[i]);
printf ("\nsum of all marks = %d\n", sum);
printf ("\naverage of marks = %f\n", avg);
return 0;
}
Program No. 11:
Write a C Program to remove duplicate element in a single dimensional array
Source Code:
/* Program to remove duplicate element in a single dimensional array */
#include <stdio.h>
int main ()
{
int a[50], i, j, k, n;
printf ("Enter the Total elements in an array:\n");
scanf ("%d",&n);
printf ("Enter %d elements of an array: \n", n);
for ( i = 0; i < n; i++)
scanf ("%d",&a[i]);
/* use nested for loop to find the duplicate elements in array */
for (i = 0; i < n; i++)
for (j = i+1; j < n; j++)
if (a[i] == a[j])
{
for ( k=j; k<n-1; k++)
a[k] = a[k+1];
n--;
j--;
}
/* display an array after deletion or removing of the duplicate elements */
printf ("\nArray elements after deletion of the duplicate elements: ");
for ( i = 0; i < n; i++)
printf ("%5d", a[i]);
return 0;
}
Program No. 12:
Write a C Program to perform addition and subtraction of matrices
Source Code:
/* Program to perform addition and subtraction of matrices */
#include<stdio.h>
int main()
{
int a[10][10],b[10][10], c[10][10],d[10][10],m,n,i,j;
printf("Enter the order of A and B matrices:\n");
scanf("%d%d",&m,&n);
printf("Enter A matrix values row by row:\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);
printf("Enter B matrix values row by row:\n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&b[i][j]);
/* Addition of A and B Matrices */
for(i=0;i<m;i++)
for(j=0;j<n;j++)
c[i][j]= a[i][j] + b[i][j];
/* Subtraction of A and B Matrices */
for(i=0;i<m;i++)
for(j=0;j<n;j++)
d[i][j]= a[i][j] - b[i][j];
printf("A matrix is:\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%4d",a[i][j]);
printf("\n");
}
printf("B matrix is:\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%4d",b[i][j]);
printf("\n");
}
printf("Addition C matrix is:\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%4d",c[i][j]);
printf("\n");
}
printf("Subtraction D matrix is:\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%4d",d[i][j]);
printf("\n");
}
return 0;
}
Part-B
Program No. 13:
Write a C Program to find the length of a string without using built in function.
Source Code:
/* Program to find the length of a string without using built in function */
#include<stdio.h>
int main()
{
char text[81];
int len;
printf("Enter String or Text\n");
gets(text);
len = 0;
while(text[len]!='\0')
len++;
printf("Length of String is: %d\n",len);
return 0;
}
Program No. 14:
Write a C Program to demonstrate string functions.
Source Code:
/* Program to demonstrate string functions. */
#include<stdio.h>
int main()
{
char st[25],st1[25];
int l;
/* reading string from keyboard */
printf("Enter String or Text\n");
gets(st);
/* Calculate string length */
l = strlen(st);
printf("Length of String is: %d\n",l);
/* Display string in uppercase and lowercase letter */
printf("Upper string is : %s\n",strupr(st));
printf("lower string is : %s\n",strlwr(st));
/* copy one string to another string (strcpy() function */
strcpy(st1,st);
printf("After string copy function \n");
printf("String1 is: %s\n",st);
printf("String2 is: %s\n",st1);
/* comparision two string strcmp() function */
if (strcmp(st1,st)==0)
printf("Both strings are similar\n");
else
printf("Both strings are different\n");
/* Add one string contents at end another strcat()(concatenate) function */
strcat(st,st1);
printf("after strcat() function execute:\n");
printf("String1 is: %s\n",st);
printf("String2 is: %s\n",st1);
return 0;
}
Program No. 15:
Write a C Program to Demonstrate Pointers in C.
Source Code:
/* Program to Demonstrate Pointers in C */
#include<stdio.h>
int main()
{
int x = 10, y = 30;
int *ptr; /* Pointer var declare */
ptr = &y;
x = x + *ptr;
printf("Value of y is %d\n", y);
printf("%d is stored at address = %u\n",y, &y);
printf("%d is stored at address = %u\n",*(&y), &y);
printf("%d is stored at address = %u\n",*ptr, ptr);
printf("%d is stored at address = %u\n",ptr, &ptr);
printf("%d is stored at address = %u\n",x, &x);
*ptr = 200;
printf("\nnow y is = %d\n", y);
return 0;
}
Program No. 16:
Write a C Program to Check a number for Prime by defining isprime() function.
Source Code:
/* C Program to Check a number for Prime by defining isprime() function */
#include<stdio.h>
#include<math.h>
int isprime(int);
int main()
{
int n, flag;
printf("Enter an integer number: ");
scanf("%d",&n);
flag = isprime(n); /* isprime() function call */
if(flag==0)
printf("%d is prime number\n", n);
else
printf("%d is not prime number\n", n);
return 0;
}
/* Function definition */
int isprime(int x)
{
int s, i;
s=sqrt(x);
for(i=2;i<=s;i++)
if(x % i==0)
return(1);
return(0);
}
Program No. 17:
Write a C Program to read, display and to find trace of a square matrix.
Source Code:
/* Program to read, display and to find trace of a square matrix */
#include<stdio.h>
int main()
{ int a[10][10],i,j,m,n,trc;
printf("Enter the row and col size:\n");
scanf("%d%d",&m,&n);
/*check square matrix condition and read values */
if (m != n)
printf("Not a Square matrix, re-enter correct order of matrix\n");
else
{
printf("Enter the values of matrix row by row \n");
for(i=0;i<m;i++)
for(j=0;j<n;j++)
scanf("%d",&a[i][j]);
/* find trace of matrix */
trc = 0;
for(i=0;i<m;i++)
for(j=0;j<n;j++)
if(i==j)
trc += a[i][j];
printf("Your Matric A is:\n");
for(i=0;i<m;i++)
{
for(j=0;j<n;j++)
printf("%5d",a[i][j]);
printf("\n");
}
printf("\nTrace of A matrix is = %d\n",trc);
}
return 0;
}
Program No. 18:
Write a C Program to read, display and add two m x n matrices using function.
Source Code:
/* Program to read, display and add two m x n matrices using function */
#include<stdio.h>
/* function prototype declaration */
void read(int x[][10], int r, int c);
void display(int x[][10], int r, int c);
void add(int x[][10], int y[][10],int z[][10], int r,int c);
int main()
{
int a[10][10],b[10][10], c[10][10],i,j,m,n,trc;
printf("Enter the order of A and B matrices:\n");
scanf("%d%d",&m,&n);
printf("Enter A matrix values row by row:\n");
read(a,m,n);
printf("Enter B matrix values row by row:\n");
read(b,m,n);
printf("A matrix is:\n");
display(a,m,n);
printf("B matrix is:\n");
display(b,m,n);
add(a,b,c,m,n);
printf("C matrix (A+B) is:\n");
display(c,m,n);
return 0;
}
void read(int x[][10], int r, int c)
{
int i,j;
for(i=0;i<r;i++)
for(j=0;j<c;j++)
scanf("%d",&x[i][j]);
}
void display(int x[][10], int r, int c)
{
int i,j;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
printf("%4d",x[i][j]);
printf("\n");
}
}
void add(int x[][10], int y[][10],int z[][10], int r,int c)
{
int i,j;
for(i=0;i<r;i++)
for(j=0;j<c;j++)
z[i][j] = x[i][j]+y[i][j];
}
Program No. 19:
Write a C Program to read, display and multiply two m x n matrices using function.
Source Code:
/* Program to read, display and multiply two m x n matrices using function */
#include<stdio.h>
/* function prototype declaration */
void read(int x[][10], int r, int c);
void display(int x[][10], int r, int c);
void mul(int x[][10], int y[][10],int z[][10], int r1,int c1, int c2);
int main()
{
int a[10][10],b[10][10], c[10][10],i,j,m,n,p,q;
printf("Enter the order (m x n) of A matrices:\n");
scanf("%d%d",&m,&n);
printf("Enter the order (p x q) of B matrices:\n");
scanf("%d%d",&p,&q);
if(n != p)
{
printf("Multiplication not possible\n A Matrix Col must be Equal to B Matrix row\n”);
printf(“Re-enter correct order and try again …..\n”);
}
else
{
printf("Enter A matrix values row by row:\n");
read(a,m,n);
printf("Enter B matrix values row by row:\n");
read(b,p,q);
mul(a,b,c,m,n,q);
printf("A matrix is:\n");
display(a,m,n);
printf("B matrix is:\n");
display(b,p,q);
printf("C matrix (A x B) is:\n");
display(c,m,q);
}
return 0;
}
void read(int x[][10], int r, int c)
{
int i,j;
for(i=0;i<r;i++)
for(j=0;j<c;j++)
scanf("%d",&x[i][j]);
}
void display(int x[][10], int r, int c)
{
int i,j;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
printf("%4d",x[i][j]);
printf("\n");
}
}
void mul(int x[][10], int y[][10],int z[][10], int r1,int c1, int c2 )
{
int i,j,k;
for(i=0;i<r1;i++)
for(j=0;j<c2;j++)
{
z[i][j] = 0;
for(k = 0; k<c1; k++)
z[i][j] += x[i][k]*y[k][j];
}
}
Program No. 20:
Write a C Program to read a string and to find the number of alphabets, digits, vowels, consonants, spaces and special characters.
Source Code:
/* Program to read a string and to find the number of alphabets, digits Vowels, consonants, spaces and special characters */
#include<stdio.h>
#include<ctype.h>
#include<string.h>
int main()
{
char st[81];
int alpha, digit, v, c, spc, sc,l,i;
printf("Enter the string:\n");
gets(st);
l = strlen(st);
alpha = digit = v = c = spc = sc = 0;
for(i=0; i<l; i++)
{
if(isalpha(st[i]))
alpha++;
if(isdigit(st[i]))
digit++;
if(isspace(st[i]))
spc++;
if(toupper(st[i])=='A'|| toupper(st[i])=='E'|| toupper(st[i])=='I'||
toupper(st[i])=='O'|| toupper(st[i])=='U') v++;
c = alpha - v;
sc = l-alpha-digit;
}
printf("Total Alphabet = %d\n", alpha);
printf("Total digits = %d\n", digit);
printf("Total spaces = %d\n", spc);
printf("Total Vowels = %d\n", v);
printf("Total Consonents = %d\n", c);
printf("Total Special Characters = %d\n", sc);
printf("Total size(length) = %d\n", l);
printf("Total words = %d\n", spc+1);
return 0;
}
Program No. 21:
Write a C Program to reverse a string-using pointer.
Source Code:
/* Program to reverse a string using pointer */
#include<stdio.h>
#include<ctype.h>
#include<string.h>
int main()
{
char str[50], *st, *ls, temp;
int l,i;
printf("Enter the string:\n");
gets(str);
l = strlen(str);
st = str;
ls = str+l-1;
for(i=0; i<l/2; i++)
{
temp = *st;
*st = *ls;
*ls = temp;
st++;
ls--;
}
printf("Reverse String = %s\n",str);
return 0;
}
Program No. 22:
Write a C Program to swap two numbers using Pointer.
Source Code:
/* Program to Swap two numbers using Pointer */
#include<stdio.h>
void swap(int *, int *); /* Function prototype*/
int main()
{
int a,b;
printf("Enter the two numbers a and b:\n");
scanf("%d%d", &a,&b);
printf("Before swapping the number is:\n");
printf("a = %d\tb = %d\n",a,b);
swap(&a, &b); /*function call */
printf("After swapping the number is:\n");
printf("a = %d\tb = %d\n",a,b);
return 0;
}
/* function definition */
void swap(int *x, int *y)
{
int t;
t = *x;
*x = *y;
*y = t;
}
Program No. 23:
Write a C Program to demonstrate student structure to read and display records of n students.
Source Code:
/*Program to demonstrate student structure to read and display records of n students*/
#include<stdio.h>
struct student
{
int rl;
char nm[20];
int m1;
int m2;
int t;
float per;
};
int main()
{
struct student st[50];
int i, n;
printf("Enter How many students: ? ");
scanf("%d",&n);
for(i=0; i<n; i++)
{
printf("Enter student %d information:\n",i+1);
printf("Name : ");
fflush(stdin);
gets(st[i].nm);
printf("Roll No. : "); scanf("%d",&st[i].rl);
printf("Subject 1 Marks : "); scanf("%d",&st[i].m1);
printf("Subject 2 Marks : "); scanf("%d",&st[i].m2);
/* calculation part */
st[i].t = st[i].m1 + st[i].m2;
st[i].per = st[i].t/2.0;
}
printf("\n\t\tStudent List is \n");
printf("----------------------------------------------------------------------------\n");
printf("%-10s %-20s %12s %12s %10s %8s\n","ROll No","Name", "Sub1 Marks","Sub2 Marks", "Total","Per");
printf("---------------------------------------------------------------------------\n");
for(i=0; i<n; i++)
{
printf("%-10d %-20s %12d %12d %10d %8.2f\n",st[i].rl,st[i].nm,st[i].m1,st[i].m2,st[i].t,st[i].per);
}
return 0;
}
Program No. 24:
Write a C Program to demonstrate the difference between structure and union.
Source Code:
/*Program to demonstrate the difference between structure and union */
#include<stdio.h>
/* define structre data type using keyword struct */
struct abc
{
int a;
float b;
char c;
};
/* define union data type using keyword union */
union xyz
{
int x;
float y;
char z;
};
int main()
{
struct abc p = {10,15.68,'A'};
union xyz q = {20,25.45,'B'};
/* size of structure and union used into memory */
printf("size of struct data type abc = %d\n", sizeof(struct abc));
printf("size of union data type xyz = %d\n", sizeof(union xyz));
/* Display structure and union members */
printf("Structure's member display \n");
printf("a = %d\n",p.a);
printf("b = %f\n",p.b);
printf("c = %c\n",p.c);
printf("union's member display \n");
printf("x = %d\n",q.x);
printf("y = %f\n",q.y);
printf("z = %c\n",q.z);
return 0;
}
