文件操作

#include<stdio.h>
#include<string.h>
#include <stdlib.h>
#pragma warning(disable : 4996)

int main()

{

//写文件

/*FILE *fileP = NULL;
fileP = fopen("test.txt", "w+");
fprintf(fileP,"Allen\n");
fputs("MARC", fileP);
fclose(fileP);*/

 

//读文件

//FILE *fp = NULL;
//char charBuffer[200];

//fp = fopen("test.txt", "r");
//fscanf(fp, "%s", charBuffer);//从文件中读取字符串，如果遇到第一个空格和换行符时，停止读取
//printf("1:%s", charBuffer);
//fscanf(fp, "%s", charBuffer);//从文件中读取字符串，如果遇到第一个空格和换行符时，停止读取
//printf("%s\n", charBuffer);

//fgets(charBuffer, 200, fp);//从文件指针中读取n-1个字符
//fscanf(fp, "%s", charBuffer);
//printf("2:%s\n", charBuffer);

//fgets(charBuffer, 200, fp);
//fscanf(fp, "%s", charBuffer);
//printf("3:%s\n", charBuffer);
//fclose(fp);

 

//对读文件进行判断
//FILE *fp;
//char myChar;
//if ((fp = fopen("test.txt","rt")) == NULL)
//{
// puts("文件读取失败|\n");
// exit(0);
//}
//while ((myChar = fgetc(fp)) != EOF)
//{
// putchar(myChar);
//}
////putchar("\n");

//fclose(fp);

 

FILE *fp;
char ch;
fp = fopen("test.txt", "rt");
if (fp == NULL)
{
puts("文件读取失败\n");
exit(0);
}

while ((ch = fgetc(fp)) != EOF)
{
putchar(ch);
}

putchar('\n');

if (ferror(fp))
{
puts("读取出错\n");
}
else
{
puts("读取成功");
}
fclose(fp);

 

 

return 0;
}