题目链接：http://codeforces.com/problemset/problem/510/A
Fox Ciel starts to learn programming. The first task is drawing a fox! However, that turns out to be too hard for a beginner, so she decides to draw a snake instead.
A snake is a pattern on a n by m table. Denote c-th cell of r-th row as (r,?c). The tail of the snake is located at (1,?1), then it‘s body extends to (1,?m), then goes down 2 rows to (3,?m), then goes left to (3,?1) and so on.
Your task is to draw this snake for Fox Ciel: the empty cells should be represented as dot characters (‘.‘) and the snake cells should be filled with number signs (‘#‘).
Consider sample tests in order to understand the snake pattern.
The only line contains two integers: n and m (3?≤?n,?m?≤?50).
n is an odd number.
Output n lines. Each line should contain a string consisting of m characters. Do not output spaces.
3 3
### ..# ###
3 4
#### ...# ####
5 3
### ..# ### #.. ###
9 9
######### ........# ######### #........ ######### ........# ######### #........ #########
代码如下：
#include <cstdio>
#include <cstring>
#include <cmath>
#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
int t, n, m;
while(~scanf("%d%d",&n,&m))
{
int k = 0;
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= m; j++)
{
if(i%2 == 1)
{
printf("#");
}
else if(i%2 == 0 && k == 0)
{
if(j == m)
printf("#");
else
printf(".");
if(j == m)
k = 1;
}
else if(i%2 == 0 && k == 1)
{
if(j == 1)
printf("#");
else
printf(".");
if(j == m)
k = 0;
}
}
printf("\n");
}
}
return 0;
}CodeForces 510 A. Fox And Snake（模拟啊 ）
原文：http://blog.csdn.net/u012860063/article/details/43458289