Program to calculate compound interest.

#include <stdio.h>
#include <conio.h>
#include <math.h>
void main()
{
int p,t;
float r,amt,ci;
clrscr();

printf ("Enter Principal Amount: ");
scanf ("%d",&p);

printf ("Enter Time: ");
scanf ("%d",&t);

printf ("Enter Rate of interest: ");
scanf ("%f",&r);

amt= p*pow((1+r/100),t);
ci = amt-p;

printf ("Simple interest: %7.2f ",ci);
printf ("Total amount: %7.2f ",amt);

getch();

}