用C语言写一个生成数据的程序：⚫生成input.ifo文件（文件格式可以是文本文件，也可以是二进制文件），包含30个人名字（字符串：自己名字+随机编号，要求名字不同，随机编号用随机数生成，并保证不同）

以下是一个简单的用C语言生成input.ifo文件的程序，其中使用了rand()函数生成随机数来生成随机编号。

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

#define NUM_NAMES 30
#define MAX_NAME_LEN 20

int main() {
    // Open the output file for writing
    FILE* outfile = fopen("input.ifo", "w");
    if (!outfile) {
        printf("Error: Could not open file for writing!\n");
        return 1;
    }

    // Set up an array of first names
    const char* first_names[] = {
        "Alice",
        "Bob",
        "Charlie",
        "David",
        "Eve",
        "Frank",
        "Grace",
        "Heidi",
        "Ivan",
        "John",
        "Kate",
        "Larry",
        "Mallory",
        "Nancy",
        "Oscar",
        "Peggy",
        "Quincy",
        "Randy",
        "Steve",
        "Tina",
        "Ursula",
        "Victor",
        "Wendy",
        "Xavier",
        "Yvonne",
        "Zoe"
    };
    const int num_first_names = sizeof(first_names) / sizeof(first_names[0]);

    // Generate and write out the names
    for (int i = 0; i < NUM_NAMES; i++) {
        // Generate a random number for the last name
        int last_name_num = rand() % 10000;

        // Choose a random first name
        const char* first_name = first_names[rand() % num_first_names];

        // Build the full name
        char full_name[MAX_NAME_LEN + 1];
        snprintf(full_name, MAX_NAME_LEN + 1, "%s_%d", first_name, last_name_num);

        // Write the name to the file
        fprintf(outfile, "%s\n", full_name);
    }

    // Close the output file
    fclose(outfile);

    printf("Done!\n");
    return 0;
}