#include <stdio.h>

char *fgets(char *s, int size, FILE *stream);

使用fgets获取文件内容

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

int main(void)
{
    char str[100] = {0};
    FILE *fp = NULL;

    fp = fopen("./test_file", "r");
    if (NULL == fp)
    {
        perror("fopen error");
        exit(-1);
    }

    while (NULL != fgets(str, sizeof(str), fp))
    {
        printf("%s", str);
    }

    fclose(fp);
    exit(0);
}