Q:

Transferring output of a program to a file in C

I have written a C program to get all the possible combinations of a string. For example, for abc, it will print abc, bca, acb etc. I want to get this output in a separate file. What function I should use? I don't have any knowledge of file handling in C. If somebody explain me with a small piece of code, I will be very thankful.

A:

Using function fopen (and fprintf(f,"…",…); instead of printf("…",…); where f is the FILE* obtained from fopen) should give you that result. You may fclose() your file when you are finished, but it will be done automatically by the OS when the program exits if you don't.

A:

If you're running it from the command line, you can just redirect stdout to a file. 
On Bash (Mac / Linux etc):
./myProgram > myFile.txt

or on Windows
myProgram.exe > myFile.txt

