Write a C++ program to compute simple interest and compound interest.

In this section, you will learn how to read the principle, rate and time from the user and write a C++ program to calculate simple interest and the total amount.

SIMPLE INTERSET = (P*R*T)/100

(Here, P = Principal Amount, R= Rate and T= Time)

TOTAL AMOUNT = P + Simple Interest

Logic :

1. Take input principle amount, time and rate in some variable.
2. Then take input time in some variable.
3. Then take input rate in some variable.
4. Find simple interest using formula mentioned above.
5. Finally, print the value of Simple Interest.
6. Then, to find the Total amount add principal amount to the simple interest.

COMPOUND INTEREST :-

TOTAL AMOUNT = P*(1 +  R/100)^T

COMPOUND INTEREST = TOTAL AMOUNT – P

C++ program to compute simple interest and compound interest.

// Program to compute simple interest and compound interest.
using namespace std;

#include<iostream>
#include<math.h>

int main()
{
    int p,t;
    float r,si,ci,amt1,amt2;
    
    cout<<"Enter the Principal amount : ";
    cin>>p;
    cout<<"Enter the Time period : ";
    cin>>t;
    cout<<"Enter the Rate of interest : ";
    cin>>r;
    
    si = p*t*r/100;
    amt1 = p + si;
    
    amt2 = p*pow((1+r/100),t);
    ci = amt2 - p;
    
    cout<<"====Given Data are ===="<<endl;
    cout<<"P = "<<p<<endl;
    cout<<"T = "<<t<<endl;
    cout<<"R = "<<r<<endl;
    cout<<"============ output =========="<<endl;
    cout<<"Simple interest = "<<si<<"  Total Amt = "<<amt1<<endl;
    cout<<"compound interest = "<<ci<<"  Total Amt = "<<amt2<<endl;
     return 0;
}

Output :-