int main()
        {
         int a[10];
         int i;
         int x;
          printf("Please enter a Array:\n");
　　     ]for(i=0; i<10; i++0
            {
              printf("a[%d]=",i);
            scanf("%d",&a[i]);
          }
           printf(“input the number you want to find x：”);
            scanf(“%d”,  &x    );
           for(i=0;i<10;i++)
           {
             if(x==a[i])
             {
                 if(i<10)
                 {
                     printf("the pos of x is：%d\n",i);
                 }
                 else
                 {
                     printf("can not find the x");
                 }
              }
              
            break;
           }
           return 0;
        }

目测有全角符号

#include <stdio.h>

int main()
{
    int a[10];
    int i;
    int x;
    printf("Please enter a Array:\n");

//]for(i=0; i<10; i++0

    for(i=0; i<10; i++)
    {
        printf("a[%d]=",i);
        scanf("%d",&a[i]);
    }

//    printf(“input the number you want to find x：”);
//    scanf(“%d”,  &x    );

    printf("input the number you want to find x：");
    scanf("%d", &x);
    for(i=0; i<10; i++)
    {
        if(x==a[i])
        {
            if(i<10)
            {
                printf("the pos of x is：%d\n",i);
            }
            else
            {
                printf("can not find the x");
            }
        }

        break;
    }
    return 0;
}

1，3句中间有一个 using namespace std;