Example C program to find simple and compound interest:

#include<stdio.h>

#include<math.h>

int main()

{

        int p,t;

        float r,si,amount,ci;

        printf("Please enter principal,time and rate of interest");

        scanf("%d%d%f",&p,&t,&r);

        si=p*t*r/100;

//Simple Interest formula is p*t*r

        printf("\nSimple interest = %.3f",si);

//Compound Interest formula is below

        amount=p*pow((1 +r/100),t);

        ci=amount-p;

        printf("\nCompound interest = %.3f",ci);

}

#include<stdio.h>

#include<math.h>

int main()

{

int p,t;

float r,si,amount,ci;

printf("Please enter principal,time and rate of interest");

scanf("%d%d%f",&p,&t,&r);

si=p*t*r/100;

//Simple Interest formula is p*t*r

printf("\nSimple interest = %.3f",si);

//Compound Interest formula is below

amount=p*pow((1 +r/100),t);

ci=amount-p;

printf("\nCompound interest = %.3f",ci);

}

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