求大佬帮忙，为什么这个不输出结果

rt
#include<stdio.h>
#include<string.h>
int main()
{
char a[10];
char c1;
int t, i;
int num = 0;
c1 = getchar();
scanf_s("%d\n", &t);
for (i = 0; i < 10; i++)
gets(a);
switch (t)
{
case 0:
if (c1 >= 87)
c1 = c1 - 32;
for (i = 0; i < 10; i++)
{
if (a[i] >= 87) a[i] = a[i] - 32;
if (c1 == a[i])
num = num + 1;
}
break;
case 1:
for (i = 0; i < 10; i++)
{
if (c1 == a[i])
num = num + 1;
}
break;
}
printf("%d", num);
return 0;
}