c - 如果整数序列的后续数字大于前一个，则显示 'increasing'

Question

Write a program that reads a sequence of integers and print 'increasing' if each subsequent number is greater than the previous, or print 'not increasing' otherwise. End of reading numbers ending is when you read a negative number.

这是我到目前为止得到的:

#include <stdio.h>
int main()
{
    int a[100],i;

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

    for(i=0;;i++)
    {
        if(a[i]<0)
            break;

        if(a[i+1]>a[i])
        {
            printf("increasing\n");
        }
        else if(a[i+1]<a[i])
            printf("not increasing\n");
    }

    return 0; 
}

示例输入:1 4 6 2 6 3 -1
示例输出:

increasing
increasing
not increasing
increasing
not increasing

然后我得到:

increasing
increasing
not increasing
increasing
not increasing
not increasing

我的问题是最后一个不需要的“不增”怎么去掉？

Answer 1

一个简单的解决方法是更改​​此测试(在第二个循环中)，从:

 if(a[i]<0)
    break;

到:

 if(a[i + 1]<0)
    break;

但是请注意，这不是很可靠，但对于简单的家庭作业来说可能已经足够了。