输入字符串：c++:1,python:3,c:5,java:4,rust:2 请将其中的字符串按照升序排序输出：（输出的格式按照逗号隔开） c,c++,java,python,rust请用C语言实现代码

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

#define MAX_LEN 50

typedef struct {
    char name[MAX_LEN];
    int count;
} Language;

int compare(const void *a, const void *b) {
    Language *la = (Language *)a;
    Language *lb = (Language *)b;
    return strcmp(la->name, lb->name);
}

int main() {
    char str[] = "c++:1,python:3,c:5,java:4,rust:2";
    Language languages[5];
    char *token = strtok(str, ",");
    int i = 0;
    while (token != NULL) {
        char *colon = strchr(token, ':');
        strncpy(languages[i].name, token, colon - token);
        languages[i].name[colon - token] = '\0';
        languages[i].count = atoi(colon + 1);
        token = strtok(NULL, ",");
        i++;
    }
    qsort(languages, 5, sizeof(Language), compare);
    for (i = 0; i < 5; i++) {
        printf("%s,", languages[i].name);
    }
    return 0;
}