Redefining the function fopen for files and getting the name

[TheMathNoob]

Homework Statement

How can you redefine a function in c. In this case I am trying to redefine fopen but it doesn't work because in the main the file doesn't change

Homework Equations

#include "InputLib.h"

FILE* file_open(char* pt)
{
FILE* fp = malloc(sizeof(FILE*)); // I tried this code without malloc and it doesn't work. I assume that this way would be better because I am allocating memory so fp won't be lost;
fp=fopen(pt,"w+");
return fp;[/B]
}

char* getName()
{
char* pt= calloc(SIZE,sizeof(char));
fgets(pt,SIZE,stdin);
return pt;
}
#ifndef INPUTLIB_H_
#define INPUTLIB_H_
#include "IntList.h"
char* getName();
FILE* file_open(char infile[]);
const int SIZE=50;
#endif /* INPUTLIB_H_ */

The Attempt at a Solution

#include "IntList.h"

int main(void)
{
char C[80];
FILE* MyFile;
//printf("enter the name of the file");
printf("enter the name of the file");
fflush(stdout);
MyFile=file_open(getName());
printf("Enter a sentence");
fflush(stdout);
gets(C);
fprintf(MyFile,"%s",C);
fclose(MyFile);
}

 

[NascentOxygen]

Do you really need to redefine a standard function? It doesn't sound like good programming practice to me.
I know that doesn't answer your question, though.

 

[Mark44]

@TheMathNoob, yesterday several people, including myself, asked you multiple times to use code tags around your code. I have closed this thread in an effort to get you to start doing this. If you don't know how, look at the thread you posted yesterday.

 

[Mark44]

Do you really need to redefine a standard function? It doesn't sound like good programming practice to me.

I'll go further -- it's a really bad idea. If the standard library function isn't working right for you, don't rewrite the function -- figure out how you are misusing it.