在二维数组中的查找

#include <iostream>
using namespace std;
bool find(int data[],int rows,int columns,int k){
    bool found=false;
    if(data!=NULL||rows>0||columns>0){
        int row=0;
        int column=columns-1;
        while(row<rows&&column>=0){
            if(data[row*columns+column]==k){
                found=true;
                break;
            }else if(data[row*columns+column]>k)
                column--;
            else
                row++;
        }
    }
    return found;
}
int main() {
	cout  << "test\n";
	int data[]={1,2,8,9,
	            2,4,9,12,
	            4,7,10,13,
	            6,8,11,15
	        };
    cout <<	find(data,4,4,23);
	return 0;
}

测试结果

test
0