C program to calculate simple interest

       Simple interest is a method of calculating interest charged on fixed deposit

    Formula  i=(Ptr/100)

    Where i:Interese

               p:Principal

               t:time period

               r:rate of interest/year

    #include <stdio.h>

    int main()

    {

    int principal,time;

    float r,i;

    printf("input principal amount\n");

    scanf("%d",&principal);

    printf("input time (in year)\n");

    scanf("%d",&time);

    printf("input the rate of interest\n");

    scanf("%f",&r);

    i=(principal*time*r)/100;

    printf("Total interest %f\n",i);

    }

  OUTPUT:

     input principal amount

    10000

     input time (in year)

     4

     input the rate of interest

     7.5

     total interest 3000.000000