61 wins the Offer-- face questions: straight poker

61 is inscribed: poker straight
Title: playing card from five cards randomly drawn, a determination is not straight, i.e., five cards are not continuous. 2 to 10 as the number itself, A is 1, J is 11, Q is 12, K 13, and large, any number can be seen as Wang.

#include<iostream>
#include<algorithm>
using namespace std;
int compare(const void* arg1, const void* arg2){
	return *(int*)arg1 - *(int*)arg2;
}
bool IsContinuous(int* numbers, int length){
	if(numbers==NULL || length<1) return false;
	
	qsort(numbers, length, sizeof(int), compare);  // 数组递增排序
	
	int numberOfZero=0;
	int numberOfGap=0;
	
	// 统计数组中 0 的个数
	for(int i=0;i<length && numbers[i]==0;i++){
		numberOfZero++;
	} 
	
	// 统计数组中的间隔数目
	int small=numberOfZero;
	int big=small+1;
	while(big<length){
		// 两个数相等,有对子,不可能是顺子
		if(numbers[small]==numbers[big]) return false;
		
		numberOfGap+=numbers[big]-numbers[small]-1;
		small=big;
		big++; 
	} 
	return (numberOfGap>numberOfZero)?false:true;
} 
int main() {
	int cards[]={0,1,3,4,5};
	printf("%d", IsContinuous(cards, 5));
	return 0;
}