clang

#include<stdio.h>
#include<conio.h>
int main()
{
    int p,t,r,a;
    clrscr();
    printf("Enter Prinicpal Amount:\t");
    scanf("%d", &p);
    printf("Enter Time (in Years):\t");
    scanf("%d", &t);
    printf("Enter Rate of Interest:\t");
    scanf("%d", &r);
    a = interest(p,t,r);
    printf("Simple Interest = %d\n", a);
    getch();
}
int interest(int p, int t, int r)
{
    int si;
    si=(p* t * r)/100;
    return(si);
}