oj_demo1/144 字符串中A的数量.c

#include <stdio.h>

int main() {
    char s[100] = {0};
    scanf("%s", s);
    int i = 0;
    while (s[i++]);
    int n = 0;
    for (int j = 0; j < i; ++j) {
        if (s[j] == 'A') n++;
    }
    printf("%d\n", n);
    return 0;
}