Converting 8 bytes to integer

[mjbauer95]

I am working with a binary file and I have 8 bytes that I want to convert to an integer.

This way works:

unsigned char buf[1024];
long long value;

value = ((long long)buf[0]<<56) | ((long long)buf[1]<<48) | ((long long)buf[2]<<40) | ((long long)buf[3]<<32) | (buf[4]<<24) | (buf[5]<<16) | (buf[6]<<8) | buf[7];

printf("%lld\n", value);

But it's not very elegant. Is there any elegant way to convert 8 bytes to an integer.

[Banfa]

That is the way to do it, white space can make it more readable but generally all portable methods will involve doing something similar to what you have done.

[BillyTKid]

unsigned long long value;

if( 1==fread((unsig ned char*)&value,si zeof value,1,FILEptr ) )
...
writing the file e.g.
if( 1==fwrite((unsi gned char*)&value,si zeof value,1,FILEptr ) )
...