如何在C中读取.PBM二进制文件

FILE *file = fopen("example.pbm", "rb");

char header[3];
fread(header, sizeof(char), 2, file);
header[2] = '\0';

int width, height;
fscanf(file, "%d %d\n", &width, &height);

unsigned char *pixels = (unsigned char*)malloc(width * height * sizeof(unsigned char));
fread(pixels, sizeof(unsigned char), width * height, file);

fclose(file);

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

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

    char header[3];
    fread(header, sizeof(char), 2, file);
    header[2] = '\0';

    int width, height;
    fscanf(file, "%d %d\n", &width, &height);

    unsigned char *pixels = (unsigned char*)malloc(width * height * sizeof(unsigned char));
    fread(pixels, sizeof(unsigned char), width * height, file);

    fclose(file);

    // 处理读取到的像素数据
    // ...

    free(pixels);

    return 0;
}