题解 | #删除字符串中出现次数最少的字符#

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

int main() {

    char str[20] = {0};
    int flag[26] = {0};     //注意网络编译器需要初始化定义字符串
    fgets(str, 20, stdin);
    int len = strlen(str);

    for (int i = 0; i<len; i++) 
    {
        flag[str[i]-'a']++;
    
    }

    int min = flag[str[0]-'a'];

    for (int i=0; i<26; i++) {
    if (min > flag[i] && flag[i] > 0) {
        min = flag[i];
    }
    }
    for (int i = 0; i<len; i++)
    {
        if (flag[str[i] - 'a'] > min) {
            printf("%c",str[i]);      
        }
    } 

        printf("\n");

    return 0;
}