二维数组中的查找问题

源代码

#ifndef SEARCHDATA_TWODIMENSION_H
#define SEARCHDATA_TWODIMENSION_H
#include<iostream>
int searchData_TwoBinaryArray(int *arr,int lineNum,int columnNum ,int searchData){
	int columnIndex=columnNum-1; 
	int lineIndex=0; 
	while(columnIndex>=0&&lineIndex<=lineNum-1&&arr!=NULL){
		if(arr[lineIndex*lineNum+columnIndex]>searchData){
			columnIndex--; 
		}else if(arr[lineIndex*lineNum+columnIndex]<searchData){
			lineIndex++; 
		}else{
			return 1; 
		}
	}
	return 0; 
}
#endif 

测试代码

int main(){
	int arr[16]={1,2,8,9,2,4,9,12,4,7,10,13,6,8,11,15}; 
	std::cout<<searchData_TwoBinaryArray(arr,4,4,7)<<std::endl; 
}

来自为知笔记(Wiz)