Checking to see if a bmp file exists in C++

Question

I create a file, a bmp file, and store it in a certain directory. What I want to check is that it is there after (so whether the creation was successful). I have

FILE *pfile;
pfile = fopen("C:\Users\me\Test-Outputs\Capture Output\test.bmp", "r");

if(pfile != NULL)
    worked!
else 
    didnt work!!

But it's not working. It says the file does not exist even though it does. Anyone know where I'm going wrong?

Answer 1

Use double backslashes. The single backslash is an escape char in C and C-like languages.

Answer 2

You have to escape the backslashes with another backslash. Try

pfile = fopen("C:\\Users\\me\\Test-Outputs\\Capture Output\\test.bmp", "r");

Using forward slashes should also work.

Answer 3

将fopen行替换为：

pfile = fopen("C:\\Users\\me\\Test-Outputs\\Capture Output\\test.bmp", "r");  

Answer 4

正如电影导演所说，请使用以下内容：

pfile = fopen("C:\\Users\\me\\Test-Outputs\\Capture Output\\test.bmp", "r");

Answer 5

I think that the better way to do that is use the "access" function.

#include <unistd.h>
int access(const char *pathname, int mode);

It returns zero on success.