如何在c中打印文件的二进制代码？

FILE *file = fopen("filename", "rb");

unsigned char buffer[1024];
size_t bytesRead = fread(buffer, sizeof(unsigned char), sizeof(buffer), file);

for (size_t i = 0; i < bytesRead; i++) {
    for (int j = 7; j >= 0; j--) {
        printf("%d", (buffer[i] >> j) & 1);
    }
    printf(" ");
}

fclose(file);

#include <stdio.h>

int main() {
    FILE *file = fopen("filename", "rb");
    if (file == NULL) {
        printf("Failed to open file.\n");
        return 1;
    }

    unsigned char buffer[1024];
    size_t bytesRead = fread(buffer, sizeof(unsigned char), sizeof(buffer), file);
    if (bytesRead == 0) {
        printf("Failed to read file.\n");
        fclose(file);
        return 1;
    }

    for (size_t i = 0; i < bytesRead; i++) {
        for (int j = 7; j >= 0; j--) {
            printf("%d", (buffer[i] >> j) & 1);
        }
        printf(" ");
    }

    fclose(file);
    return 0;
}