题解 | #计算某字符出现次数#

#include <math.h>
#include <stdio.h>
#include <string.h>

int main() {
    char a[1000], b;
    int n = 0;
    gets(a);
    //printf("a=%s\n", a);
    scanf("%c", &b);
    //printf("b=%c\n", b);
    if(b >= 'A' && b <= 'Z')
        b = b - 'A' + 'a';
    for (int i =0; i < strlen(a); i++)
    {
        if ((b == a[i]) || (b == a[i] - 'A' + 'a')) {
            n++;
        }
    }
    printf("%d\n",n);
    return 0;
}