C program to Compound Interest

Below is C program to Compound Interest.

Program:

/* Compund Interest    */
#include<stdio.h>
#include<math.h>
int main()
{
     float p,r,i,t,ci,a;

     
     printf("Type the amount : ");
     scanf("%f",&p);
     printf("Type the interest rate : ");
     scanf("%f",&r);
     printf("Type the period in years: ");
     scanf("%f",&t);
     
     i=1+(r/100);
     
     // ci=pow(i,t);
     ci=1;
     for(a=1;a<=t;a++)
        ci=ci*i;
       
     ci=p*ci-p;
     
     printf("Your compound interest is : %.2f",ci);

     return 0;
}