题解 | #字符串排序#

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

#define MAX 1000

int compare(const void* a, const void* b) {
    const char* A = (const char*)a;
    const char* B = (const char*)b;
    int len1 = strlen(A);
    int len2 = strlen(B);
    return len1 - len2;
}

int main() {
    int n;
    scanf("%d", &n);
    char data[n][MAX];
    getchar(); // 消耗掉输入缓冲区中的换行符
    for (int i = 0; i < n; i++) {
        fgets(data[i], MAX, stdin);
        data[i][strcspn(data[i], "\n")] = '\0';  // 去除换行符
        if(strcmp(data[i],"stop")==0)
        {
            n=i;
            break; 
        }
    }
    // 使用qsort函数对字符串数组按照字符串长度进行排序
    qsort(data, n, sizeof(data[0]), compare);
    for (int i = 0; i < n; i++) {
        printf("%s\n", data[i]);
    }

    return 0;
}