小小的编程问题～求解啊

初学C语言，各位可帮我看看吗

int main()
{
    int money,year;
    double interest,rate;
    scanf("%d %d %lf",&money,&year,&rate);
    interest = money * pow(1+rate,year)-money;
    printf("interest = %.2f\n",interest);
    return 0;
}