如何在C编程中读取文件？ [英] How can I read from file in C programming?

问题描述

#include <stdio.h>

int main()
{
        FILE *ff;
        ff = (fopen("E:\\empSal.txt","r"));
        fprintf(ff,"Emp: %s \t sal: %d $ \n",name,sal);
        fclose(ff);
        return 0;
}

我的尝试：



i添加了写入模式，但是当我尝试读取它没有...

What I have tried:

i added write mode it done but when i tried read it didn't ...

推荐答案

\ n，名称，sal）;
fclose（ff）;
return 0 ;
}

\n",name,sal); fclose(ff); return 0; }

我的尝试：



i添加了写入模式，但是当我尝试读取它没有...

What I have tried:

i added write mode it done but when i tried read it didn't ...

使用文件的文件指针来使用fread / fgets。



fgets样本如下。

Make use of fread / fgets using your file pointer of your file.

A sample of fgets is as below.

FILE *fp_r = NULL;
	char buff[2049] = {""};
	
	fp_r = fopen(file_path, "r");
	if(fp_r)
	{
		while(!feof(fp_r))
		{
			memset(buff,0,sizeof(lv_buff));
			fgets(buff,2048,fp_r); // Read your file data
			
			// do something with your buffer read
			....
			...
			..
			.
		}
		
		fclose(fp_r);
	}
	else
	{
		// return file open error
	}

你是试图写到文件中（当你打开它进行阅读时）。

使用 fread （或 fscanf ）阅读，请参阅 fread [ ^ ]。

You are trying to write to the file (while you have open it for reading).
Use fread (or fscanf) for reading, see fread[^].

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