Question

void echoFileA(const char* iPath,const char* oPath)
{
    FILE* iFile;
    FILE* oFile;

    iFile = fopen(iPath,"rb");
    oFile = fopen(oPath,"wb");

    while(iFile)    
        fputc(fgetc(iFile),oFile);

    fclose(iFile);
    fclose(oFile);
}

The procedure was written purely for fun, I know that there are covenient , premade functions for copying files in the every OS API libriaries. Back to the topic- why the loop condition is always true, even if the EOF was reached a long time ago?
I’ve checked that I’ve passed the correct parameters to this function in the testing program.

Answer 1

The body of your loop …

   fputc(fgetc(iFile),oFile);

… does nothing to change the condition of the loop, so it will run forever.

Instead try something like …

int c;
while((c = fgetc(iFile)) != EOF) 
   fputc(c, oFile);

The loop will end once you hit the end of the input file.