Replacing stdin within a piece of code

I have a piece of code that uses stdin. When I run the program from command-line I pass it the location of a wav file i.e. /Users/username/Desktop/music.wav.

Th开发者_如何学Pythone code is written only in C. The stdin variable runs throughout 2 functions.

How would I replace the stdin within the code with the input of the file directory and location?

In other words, how do I hard code '/Users/username/Desktop/music.wav' into two different C functions.

I think you are looking for freopen.

If I understand correctly, you read the filename from argv[1] and call freopen():

freopen(argv[1], "r", stdin);

Not that I wish to encourage hardwiring of course ....

It sounds like you wish to define the file location & reference it from multiple locations ?

You could #define the path in a header & then include that in multiple files.

E.g.

header.h

#define FILE_LOCATION "/Users/username/Desktop/music.wav"

myProgram.c

#include "header.h"

void functionA() {
    fopen(FILE_LOCATION, ...);

    /* 
     * etc ..
     */
}

void functionB() {

    printf("The file is %s\n", FILE_LOCATION);

    /* 
     * etc ..
     */
}

myOtherProgram.c

#include "header.h"

void someOtherFunction() {
   doSomethingWith(FILE_LOCATION);
}

void doSomethingWith(char *fileLoc) {

}