如何用递归算法判断一个数组是否递增

题  目 ：如何用递归算法判断一个数组是否递增

C实现：

#include <stdio.h>
bool isIncrease(int a[], int len)
{
	int n = len - 1;
	if(n==0)
		return 1;
	else
	{
		if(a[n]>=a[n-1])
			isIncrease(a,len-1);
		else
			return 0;
		
	}
	
	
}
int main()
{
	int a[] = {2,3,4,7,9,12,7};
	int len = sizeof(a)/sizeof(a[0]);
	
	int res = isIncrease(a,len) ;
	if (res==1)
		printf("a is an Increase array");
	else
		printf("a isn't an Increase array!");
		
	return 0;
	
 }