百练NOI题目解析(持续更新)

百练

2800 垂直直方图

百练NOI题目解析(持续更新)_第1张图片
输入样例:

THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG.
THIS IS AN EXAMPLE TO TEST FOR YOUR
HISTOGRAM PROGRAM.
HELLO!

输出样例:

                            *
                            *
        *                   *
        *                   *     *   *
        *                   *     *   *
*       *     *             *     *   *
*       *     * *     * *   *     * * *
*       *   * * *     * *   * *   * * * *
*     * * * * * *     * * * * *   * * * *     * *
* * * * * * * * * * * * * * * * * * * * * * * * * *
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

思路:
1.定义好常量和变量,变量用来分别存储字符串和出现的次数。
2.按照要求输入样例
3.统计好数目记住最大的数目,每次比较小于等于这个数的,输出星号,否则空格
4.注意格式
5.printf(cout) 调试法
代码:

#include
using namespace std;
const char B[26] = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
int main()
{
	char str[80];     //not upper to 80 words
	int count = 4, max = 0;   //four lines
	int number[26]={0};
   	
	while(count--)
	{
		cin.getline(str, 80);
		int j = 0;
		while(str[j])
		{
			for(int i = 0; i<26 ; i++)
			{
				if(str[j] == B[i])
					number[i] ++; //number of corresponding letter increased;
			}
			j++;
		}
	}
	for(int i = 0; i<26 ; i++)
	{
		if(number[i] > max)
			max = number[i]; //choose the max number;
		//cout<0 ; i--)
	{
		for(int j = 0; j<26 ; j++)
		{
			if(number[j] >= i)
				cout<<"* "; //number of corresponding letter increased;
			else
				cout<<"  ";
		}
		cout<

NOI

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