C语言读取文本文档里面的字符and 和只读一行；

#define _CRT_SECURE_NO_WARNINGS#include"stdio.h"#include"stdlib.h"#include"string.h"//读void main(){int i = 0;FILE *fp = NULL;char *filename = "d:/1.txt";fp = fopen(filename, "r");while (!feof(fp)){char temp=fgetc(fp);printf("%c",temp);}fclose(fp);system("pause");}//读文件，，读一行。void main(){int i = 0;FILE *fp = NULL;char str[100];char strlen = 0;char *filename = "d:/1.txt";fp = fopen(filename, "a+");while (!feof(fp)){fgets(str,10,fp);//中间的参数是指定读多少。//不懂了printf("%s", str);break;//循环一次读一行。记得要加break；}fclose(fp);system("pause");}