程序附上：
#include<stdio.h>
#include<math.h>
void main()
{
char a;
int n;
float deposit;
double capital,rate,b;
printf("Input rate, year, capital:");
scanf("%lf,%d,%lf",&rate,&n,&capital);
printf("Compound interest (Y/N)?");
scanf(" %c",&a);
b=pow((1+rate),n);
switch(a)
{case 'y||Y':
printf("deposit = %.4f\n",capital*b);
break;
case 'N||n':
printf("deposit = %.4f\n",capital*(1+rate*n));
break;
}
}

求解为啥运行到第二步输入符号的时候，我输入y，程序没有后续？

    switch(a)
    {
        //case 'y||Y':
        case 'y':
        case 'Y':
            printf("Ydeposit = %.4f\n",capital*b);
            break;
        //case 'N||n':
        case 'n':
        case 'N':
            printf("Ndeposit = %.4f\n",capital*(1+rate*n));
            break;
    }