Deposit interest rate calculator v3.0

 

#include<stdio.h>
#include<math.h>
int main()
{
    double rate, capital, deposit;
    short year;
    char flag=1;
    char c;
    printf("Input capital, year:");
    scanf("%lf,%d", &capital, &year);
    //
    switch(year)
    {
        case 1: rate=0.0225; break;
        case 2: rate=0.0243; break;
        case 3: rate=0.027;  break;
        case 5: rate=0.0288; break;
        case 8: rate=0.03;   break;
        default: flag=0;
    }
    //
    printf("Compound interest (Y/N)?");
    scanf(" %c", &c);
    if(flag!=0)//输入的年份无误
    {
        if(c=='y'||c=='Y')
        {
            deposit=capital*pow((1+rate), year);
        }
        else if(c=='n'||c=='N')
        {
            deposit=capital*(1+rate*year);
        }
        printf("rate = %.4f, deposit = %.4f\n", rate, deposit);
    }
    else
    {
        printf( "Error year!\n");
    }
    //
    return 0;
}