剑指offer_02_二维数组中的查找

#include <iostream>

using namespace std;

bool ifHasNum(int *data,int row, int col, int num){
	if(data == NULL || row <= 0 || col <= 0){
		return false;
	}
	int i = 0;
	int j = col - 1;
	while(i < row && j >= 0){
		if(num == data[i * col + j]){
			cout <<"i = "<<i<< "j="<<j<<endl;
			return true;
		} else if (num < data[i * col + j]){
			j--;
		} else {
			i++;
		}
	}
}

int main(){
	int data[16] = {1, 2 , 8 , 9, 2, 4, 9, 12, 4, 7, 10, 13, 6, 8, 11, 15};
	cout<<ifHasNum(data, 4, 4, 9)<<endl;
	cout<<ifHasNum(data, 4, 4, 8)<<endl;
	cout<<ifHasNum(data, 4, 4, 15)<<endl;
	cout<<ifHasNum(data, 4, 4, 1)<<endl;
	cout<<ifHasNum(data, 4, 4, 33)<<endl;
	cout<<ifHasNum(data, 4, 4, -1)<<endl;
	cout<<ifHasNum(NULL, 4, 4, -1)<<endl;
	cout<<ifHasNum(NULL, -4, 4, -1)<<endl;
	cout<<ifHasNum(NULL, 4, -4, -1)<<endl;
}