Question

以下代码用于排序数组这个程序给出了意想不到的输出结果错误应该在第10-19行。

#include<stdio.h>   //Sorting array program
int main()
{
    int arr[20],i,j,n,temp;
    printf("Enter number of elements  : ");
    scanf("%d",&n);
    printf("\nEnter the elements of the array : ");
    for (i=0;i<n;i++)
        scanf("%d",&arr[i]);
    for(i=0;i<n;i++)
    {
        for(j=0;j<arr[i];j++)
            if (arr[i+1]<arr[i])
            {
                temp=arr[i];
                arr[i]=arr[i+1];
                arr[i+1]=temp;
            }
    }
    printf("\nThe sorted list is : \n");
    for (i=0;i<n;i++)
        printf("\n arr[%d] : %d",i,arr[i]);
    return 0;
}

输出:: 输入元素数量：4

     Enter the elements of the array : 5
     3
     2
     1

     The sorted list is : 

      arr[0] : 3
      arr[1] : 2
      arr[2] : 1
      arr[3] : -16777216
      Process returned 0 (0x0)   execution time : 8.161 s
      Press ENTER to continue.

Answer 1

修改你喜欢的程序，你就会发现会发生什么：

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了解#include <stdio.h> //Sorting array program #include <assert.h> int main() { int arr[20], i, j, n, temp; printf("Enter number of elements : "); scanf("%d", &n); printf("\nEnter the elements of the array : "); for (i = 0; i<n; i++) scanf("%d", &arr[i]); for (i = 0; i<n; i++) { // <<< line added for (j = 0; j < arr[i]; j++) { assert(j < n); // <<< line added assert(i + 1 < n); // <<< line added if (arr[i + 1] < arr[i]) { temp = arr[i]; arr[i] = arr[i + 1]; arr[i + 1] = temp; } } // <<< line added } printf("\nThe sorted list is : \n"); for (i = 0; i<n; i++) printf("\n arr[%d] : %d", i, arr[i]); return 0; } here 。

但无论如何，算法对我来说看起来很可疑：

这条线特别可疑：

assert

Answer 2

试试这个

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>   //Sorting array program

int main()
{
    int arr[20], i, j, n, temp;

    printf("Enter number of elements  : ");
    scanf("%d", &n);
    printf("\nEnter the elements of the array : ");
    for (i = 0; i<n; i++)
        scanf("%d", &arr[i]);

    for (i = 0; i<n; i++)
    {
        for (j = 0; j<n; j++)
            if (arr[i]<arr[j])
            {
                temp = arr[i];
                arr[i] = arr[j];
                arr[j] = temp;
            }
    }
    printf("\nThe sorted list is : \n");
      for (i = 0; i<n; i++)
         printf("\n arr[%d] : %d", i, arr[i]);
    printf("\n");

   return 0;
}

试图创建排序程序，但没有按预期工作

2 个答案: