如何用C编写int值二进制和txt文件？

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

void writeIntBinaryToFile(int value, const char *filename) {
    FILE *file = fopen(filename, "w");
    if (file == NULL) {
        perror("Error opening file");
        return;
    }

    // 将整数转换为二进制字符串
    char binaryString[33]; // 32 bits + null terminator
    for (int i = 31; i >= 0; i--) {
        binaryString[31 - i] = (value & (1 << i)) ? '1' : '0';
    }
    binaryString[32] = '\0';

    // 写入文件
    fprintf(file, "%s\n", binaryString);

    fclose(file);
}

int main() {
    int number = 12345; // 示例整数
    const char *filename = "output.txt";

    writeIntBinaryToFile(number, filename);

    printf("Integer %d written to %s in binary format.\n", number, filename);

    return 0;
}