题解 | #删除字符串中出现次数最少的字符#

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

int main() {
    char str[20], rec[26] = {0};
    char len, i, j, min;
    scanf("%s", str);
    len = strlen(str);
    min = len + 1;
    for (i = 0; i < len; i++) {
        rec[str[i] - 'a']++; //计数各字符出现次数
    }

    //最少字符
    for (i = 0; i < 26; i++) {
        if (rec[i] && rec[i] < min)
            min = rec[i];
    }
    //删除最少字符

    for (i = 0, j = 0; i < len; i++) {
        if (rec[str[i] - 'a'] > min )
            str[j++] = str[i];

    }
    str[j] = 0;
    printf("%s", str);
}