Program to calculate simple interest in C

Program to calculate simple interest in C

#include <stdio.h>
#include <conio.h>
void main()
 {
            int p, t;
            float r, si;
            clrscr();
            printf("*** Simple Interest ***");
            printf("\nPrinciple : "); scanf("%d", &p);   
            printf("Rate : "); scanf("%f", &r);
            printf("Time : "); scanf("%d", &t);
            si=p*r*t/100;
            printf("\nCalculated Simple Interest : ");
            textcolor(GREEN);
            printf("%f", si);
            getch();
}