题解 | #删除字符串中出现次数最少的字符#

// 18.26-
#include <stdio.h>
#include <string.h>

int main(void){
    char str[20];
    char* p;
    int letter[26];
    while(scanf("%s",&str)!=EOF){
        int min=20;
        p=str;
        memset(letter,0,sizeof(letter));
        while(*p!='\0'){
            letter[*p-'a']++;
            p++;
        }
        for(int i=0;i<26;i++){
            if(letter[i]<min&&letter[i]!=0) min=letter[i];
        }
        p=str;
        while(*p!='\0'){
            if(letter[*p-'a']>min){
                printf("%c",*p);
            }
            p++;
        }
        printf("\n");
    }
}