C程序将随机字符串写入文件

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

void generateRandomString(char* str, int length) {
    int i;
    for (i = 0; i < length; i++) {
        str[i] = rand() % 26 + 'a'; // 生成小写字母
    }
    str[length] = '\0'; // 添加字符串结束符
}

void writeRandomStringToFile(const char* filename, int length) {
    FILE* file = fopen(filename, "w");
    if (file == NULL) {
        printf("无法打开文件\n");
        return;
    }

    char* randomString = (char*)malloc((length + 1) * sizeof(char));
    generateRandomString(randomString, length);

    fprintf(file, "%s", randomString);

    fclose(file);
    free(randomString);
}

int main() {
    const char* filename = "random.txt";
    int length = 10;

    writeRandomStringToFile(filename, length);

    printf("随机字符串已写入文件：%s\n", filename);

    return 0;
}