如何在C中打印文件中标记字符串的一部分

FILE *file = fopen("file.txt", "r");

char line[256];
while (fgets(line, sizeof(line), file)) {
    // 处理每一行的内容
}

char *found = strstr(line, "标记");
if (found != NULL) {
    // 处理包含标记字符串的行
}

printf("%s", found + strlen("标记"));

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

int main() {
    FILE *file = fopen("file.txt", "r");
    if (file == NULL) {
        printf("无法打开文件\n");
        return 1;
    }

    char line[256];
    while (fgets(line, sizeof(line), file)) {
        char *found = strstr(line, "标记");
        if (found != NULL) {
            printf("%s", found + strlen("标记"));
        }
    }

    fclose(file);
    return 0;
}