fgets()函数每次只获取一行，并且第一次只获取文本第一行，第二次获取时会忽略第一行，获取文本第二行，第n次调用函数获取第n行

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

int main()
{
	FILE *fp = NULL;
	char buf[64] = {0};
	int i;
	
    fp = fopen("/proc/meminfo", "r");// cat /proc/meminfo
    if (fp == NULL)
    {
        printf("fopen error\n");
        return 0;
    }
	
    if (fgets(buf, sizeof(buf), fp) == NULL)
    {
        printf("fgets error\n");
        return 0;
    }

	printf("buf1 = %s", buf);//Print the first line of the file
	
    if (fgets(buf, sizeof(buf), fp) == NULL)
    {
        printf("fgets error\n");
        return 0;
    }

	printf("buf2 = %s", buf);//Print the second line of the file
	
	return 0;
}