c语言5-7

1、

#include <stdio.h>

#define NUMBER 1000

int main(void)
{
    int i, num, a[NUMBER];
    do
    {
        printf("number of element: "); scanf("%d", &num);
        if(num < 1 | num > 1000)
            printf("the range is 1-%d\n", NUMBER);
    }
    while(num < 1 | num > 1000);
    
    for(i = 0; i < num; i++)
    {
        printf("NO.%d: ", i + 1); scanf("%d", &a[i]);
    }
    
    printf("{");
    for(i = 0; i < num; i++)
    {
        if(i == num - 1)
        {
            printf("%d",a[i]);
        }
        else
        {
            printf("%d,",a[i]);
        }
    }
    printf("}\n");
    
    return 0;
}