c - 数组中没有重复值

Question

我需要编写一个在数组内存储数字的程序。但它不能有重复的元素。

  int x;
  int z[8];

  for( x = 0; x<8;x++) 
      printf("number: ");
      scanf("%d",&z[x]);
  }

  for( x=0;x<8;x++) {
    printf("%d ",z[x]); 
  }

Answer 1

首先，初始化数组，这样您就不会最终读取未初始化的值并导致测试失败。

int user_nums[6] = {0};

接下来，您需要在 for 循环中进行另一次检查，以再次读取该数字是否重复。

代码将如下所示。

#include<stdio.h>
int main(){
    int x,y;
    int exists = 0;
    int user_nums[6] = {0};
    for( x = 0; x<6;x++){//for loop  to get the players selected numbers    

        do {
            exists = 0;
            printf("Enter a number(from the #'s 1-42): ");
            scanf("%d",&user_nums[x]);

            for(y =0; y < x; y++) { //to check for duplicates
                if (user_nums[x] == user_nums[y])
                {   
                    printf("Number already exists\n ");
                    exists = 1;             
                    break;
                }
            }

        }while (user_nums[x]<1 || user_nums[x]>42 || exists);//accepts only numbers from 1-42 which are not duplicates (continous to ask you for a number until condition is met).
    }

    printf("Your numbers: \n");

    for( x=0;x<6;x++){
        printf("%d ",user_nums[x]); // prints the numbers you inputed.
    }

    return 0;
}