Structured Program I – Print a Frame

题目描述

Print a Frame
Draw a frame which has a height of H cm and a width of W cm. For example, the following figure shows a frame which has a height of 6 cm and a width of 10 cm.

##########
#........#
#........#
#........#
#........#
##########

输入

The input consists of multiple datasets. Each dataset consists of two integers H and W separated by a single space.
The input ends with two 0 (when both H and W are zero).

输出

For each dataset, print the frame made of ‘#’ and ‘.’.
Print a blank line after each dataset.

题解

#include<bits/stdc++.h>
using namespace std;
int main()
{int a,b;while(scanf("%d %d",&a,&b)!=EOF){if(a==0&&b==0)break;for(int i=1;i<=a;i++){if(i==1||i==a){for(int j=0;j<b;j++){cout<<"#";}cout<<endl;}else{for(int j=1;j<=b;j++){if(j==1||j==b)cout<<"#";elsecout<<"."; }cout<<endl;}       }cout<<endl;} return 0;
}

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Structured Program I – Print a Frame

题目描述

输入

输出

题解

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