查找字符

</pre><pre name="code" class="html">#include <iostream>
#include <cstdio>
using namespace std;
bool findnum(int *numbers,int cols,int rows,int number);
int main()
{
    int n=5;
    int a[5][5];
    for(int i=0;i<n;i++)
        for(int j=0;j<n;j++)
        a[i][j]=i*n+j;
    if(findnum(&a[0][0],5,5,30))
        printf("YES
");
    else
        printf("NO
");
    return 0;
}
bool findnum(int *numbers,int cols,int rows,int number)
{
    if(numbers==NULL)
        return false;
    int col=cols-1;
    int row=0;
    while(col>=0&&row<rows)
    {
        if(number<numbers[cols*row+col])
            col--;
        if(number>numbers[row*cols+col])
            row++;
        if(number==numbers[row*cols+col])
            return true;
    }
    return false;

}