用于比较int数组不起作用的程序

时间:2014-03-24 19:10:52

标签: c arrays

因此,作为uni工作的一部分,我必须创建一个彩票模拟器。我在这个程序中也使用了2个函数。 get_lotto_draw创建一个6元素数组,其随机数在1-49之间,find_matches应该将用户定义的6元素数组与此随机生成的数组进行比较,并跟踪找到的匹配项数。该程序模拟在用户指定的年数内每周播放一次乐透。

主体:

const int WEEKS_IN_YEAR = 52;
int lottoCounter = 0;
years = years * WEEKS_IN_YEAR;

int match1 = 0;
int match2 = 0;
int match3 = 0;
int match4 = 0;
int match5 = 0;
int match6 = 0;

for(lottoCounter = 0; lottoCounter < years; lottoCounter++)
{
      int* x = get_lotto_draw(); //Use function to generate lottery numbers
      int* y = userNums;
      int found = find_matches(x, y);

      if(found == 1)
      {
               match1++;
      }

       if(found == 2)
      {
               match2++;
      }

       if(found == 3)
      {
               match3++;
      }

       if(found == 4)
      {
               match4++;
      }

       if(found == 5)
      {
               match5++;
      }

       if(found == 6)
      {
               match6++;
      }

      if(match6 != 0)
      {
                printf("Congratulations Roger, you've won the Jackpot!");
                break;
      }   
}

printf("Matched 1 number %d times", match1);
printf("\nMatched 2 number %d times", match2);
printf("\nMatched 3 number %d times", match3);
printf("\nMatched 4 number %d times", match4);
printf("\nMatched 5 number %d times", match5);
printf("\nMatched 6 number %d times", match6);

free(arrayPointer);

get_lotto_draw函数:

int* get_lotto_draw() //Returns an array of six random lottery numbers 1-49
{
     int min = 1;
     int max = 49;
     int counter = 0;

     srand(time(NULL)); //Set seed for rand as current time

     int *arrayPointer = malloc(6 * sizeof(int)); //Clear space for arrayPointer

     for(counter = 0; counter <= 5; counter++)
     {
                 int x1 = 1;

                 while(x1)
                 {
                          int temp = rand()%(max-min)+min; //Gives random number range between 1-49 inclusive
                          int i = 0;

                          for(i = 0; i < counter; i++)
                          {
                              if( arrayPointer[i] == temp)
                              {
                                break;
                              }
                          } 

                          if(i == counter)
                          {
                             x1=0;
                             arrayPointer[counter] = temp;
                          }
                  }
     }  
     return arrayPointer;
}

find_matches功能:

int find_matches(int * array1, int * array2)
{
    int* x = array1;
    int* y = array2;
    int found = 0;
    int i = 0;
    int j = 0;

    for(i = 0; i < 6; i++)
    {
          for(j = 0; j < 6; j++)
          {
                if(x[i] == y[j])
                {
                     found++;
                }
          }
    }
    return found;  
}

我遇到的问题是“匹配的1个数字%d时间”等不起作用,它们只给我0个值。我认为这个问题主要是因为我的功能在早期工作。谢谢你的时间。

修改

我将此代码添加到main:

int myArray[6] = {1, 23, 42, 32, 4, 17};
int* x = userNums;
int* y = myArray;
int found = find_matches(x, y);
printf("matches: %d", found);

这很好用。如果我输入myArray中存在的3个数字,则返回3,依此类推。

1 个答案:

答案 0 :(得分:1)

所以我从我的问题留下的评论中得到了所有的建议。我将随机种子放在main的开头而不是函数中,修复了每年抽奖的次数,并在返回arrayPointer后放置free(arrayPointer)。实施所有这些修复程序后,我的程序现在运行正常,感谢所有贡献者!