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I'm trying to create a dos-based sudoku solving program. The first step, as you can see in the code here, is to collect user input. The primary responsibility of the function "checkValid" is to...

Thanks, I misunderstood the fopen function.

Still learning c programming. I compiled the following code:




#include <stdio.h>

main() {
FILE *file;
if ((file = fopen("test.txt", "r") ) == NULL) {

Hello. I am completely new to programming so bear with me. I currently have this program compiled, built, and executed, but it is not doing what I want it to do:




#include <stdio.h>
main()...