• global variables
• function calls
• random number
• arrays

—-

• 設計一個簡單的1A2B猜數字遊戲

#include <stdio.h>
#include <stdlib.h>

#define codeLen 4


int answer[codeLen];
int guess[codeLen];

void generateCode();
void getUserGuess();
int checkAGuess();

int main()
{
  
  int quit=0;
  int count=0;
  
  generateCode();
  
  while(!quit)
  {
    printf("#%d :", ++count);
    getUserGuess(); 
    if( checkAGuess() )
      quit=1; 
  }
  printf("Bye!\n");  
}

void generateCode()
{



  answer[0]=1;
  answer[1]=2;
  answer[2]=3;
  answer[3]=4;



}

void getUserGuess()
{
  scanf("%d %d %d %d", &guess[0], &guess[1], &guess[2], &guess[3] );  
}

int checkAGuess()
{
  int a=0, b=0, i, j;
  
  for(i=0; i< codeLen ; i++)
  {
    // guess[i]
    for(j=0;j< codeLen ;j++)
    {
       if ((guess[i]==answer[j]) && (i==j))
       {
         a++;
         break;
       }
       else if (guess[i]==answer[j])
       {
         b++;
         break;
       }     
    }
  }
  
  printf("...>>>> %dA %dB\n", a, b);  
  if(a==4)
      return 1;
  else
    return 0;
}