使用 c 开发 c++ 中的复利程序问题

Question

I am trying to write a program to print simple interest and compound interest in dev c++ in c programming but it is not printing the correct compound interest can anybody tell why? here is my code:

#include<stdio.h>
#include<math.h>
int main()
{
int p,r,t,si,ci;
printf("enter the principle:");
scanf("%d",&p);
printf("enter the rate:");
scanf("%d",&r);
printf("enter the time:");
scanf("%d",&t);
si=p*r*t/100;
ci=p*pow((1+(r/100)),t);
printf("simple interest:%d",si);
printf("\ncompound interest:%d",ci);
int a=getch();
return 0;
}

Answer 1

You have given int instead of float.

#include<stdio.h>
#include<math.h>
int main(){
    float p,r,t,si,ci;
    printf("enter the principle:");
    scanf("%d",&p);
    printf("enter the rate:");
    scanf("%d",&r);
    printf("enter the time:");
    scanf("%d",&t);
    si=p*r*t/100;
    ci=p*pow((1+(r/100)),t);
    printf("simple interest:%d",si);
    printf("\ncompound interest:%d",ci);
    int a=getch();
    return 0;
}