Thread: Function problem

I used scanf in the main function to scan a character, I put the scanf in a while loop, while keyboard input it being scanned I want the other functions to operate, but I can't figure out how to get it to run properly.

Code:

//TENNIS
#include <stdio.h>

#define PRINT 0
#define GAME_A 1
#define GAME_B 2
#define DEUCE 3
#define AD_SERVER 4
#define AD_RECEIVER 5

int scoreA = 0;
int scoreB = 0;

int scoreFunct(char c);
void printFunct(int scoreA, int scoreB, char c);

int main (int argc, char **argv){

  char c;
  char team;
  
  printf ("Team A or Team B serves first?: ");
  scanf ("%c", &team);
  printf ("Team %c to serve\n", team);
  
  while(scanf("%c", &c) == 1){

  }  
  
  return(0);
}

int scoreFunct(char c){
  
    while((scoreA < 3) && (scoreB < 3)){
    if(c == 'A'){
      scoreA+=1;
    }
    else if (c == 'B'){
      scoreB+=1;
    }
    else if (c == 'S'){
      return(PRINT);
    }
  }
  
  return(0);
}

void printFunct(int scoreA, int scoreB, char c){
  
  if(scoreFunct(c) == PRINT){
    printf("%d-%d", scoreA, scoreB);
  }
}

The ones in red are what I'm stuck on, i want that function to execute while the scanf is running in the main function. I tried getchar, that gives me worse problems.

Thanks in advance

Interesting, but I have no idea what that means, so I'm not going to try to use that :P

Thanks anyways.

I just did:

Code:

 while(scanf("%c", &c) == 1){

scoreFunct(c);
  
}

to call the function, but then when I run it, and it gets to that bit, I can't enter anything, so I guess the while loop is doing something random.

Hmm, I think I solved it, I put the scanf in the other function, and just used scoreFunct(c); to call the function in the main function, without any loops. That seemed to do the trick, but now other problems :S

Programming...

Originally Posted by dwks

You check the return value of [f]getc() and getchar() against EOF for failure, not NULL. And parentheses are a good idea around code like that.

Code:

unsigned char fgetc(FILE* stream);

It's int. You can't store EOF in a char, so don't even try.


So you want your program to do other things while it's waiting for the user to press a key?

There's no standard way to do that, but you'll find mention in the FAQ of kbhit() and getch() which might do the trick. I believe that both of those functions work with Dev-C++.

Code:

#include <conio.h>

int c = 0;

do {
    if(kbhit()) {
        c = getch();
        printf("Received a key press: %c\n", c);
    }

    puts("Processing...");
} while(c != 27);  /* 27, or 0x1B, is the code for ESCAPE */

Haha what is all that, never even seen some of that code before, I can't use code I've not learnt in this assignment, but eitherways, I just put the scanning in the second function, so I pretty much figured it out, thanks anyways