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click here to have a try
Time limit 2000ms
Memory limit 262144KB

题目原题:
Petya started to attend programming lessons. On the first lesson his task was to write a simple program. The program was supposed to do the following: in the given string, consisting if uppercase and lowercase Latin letters, it:
deletes all the vowels,
inserts a character “.” before each consonant,
replaces all uppercase consonants with corresponding lowercase ones.
Vowels are letters “A”, “O”, “Y”, “E”, “U”, “I”, and the rest are consonants. The program’s input is exactly one string, it should return the output as a single string, resulting after the program’s processing the initial string.
Help Petya cope with this easy task.

Input
The first line represents input string of Petya’s program. This string only consists of uppercase and lowercase Latin letters and its length is from 1 to 100, inclusive.
Output
Print the resulting string. It is guaranteed that this string is not empty.

Examples
Input
tour

Output
.t.r

Input
Codeforces

Output
.c.d.f.r.c.s

Input
aBAcAba

Output
.b.c.b

问题简述:
把第一行输入的字母串里的元音字母去掉,然后在剩下的字母前加个“."在下一行输出。

问题分析:
考虑把大写字母化成小写字母,以及把其中的元音字母跳过(即相当于删除).
VS中通过的代码如下:

#include <iostream> 
#include<cstdio>
#include<string>
using namespace std;
int main()
{
	char a[105];
	int i, length;
	cin >> a;
    length = strlen(a);
	for (i = 0;i < length;i++)
	{
		if (a[i] == 'a' || a[i] == 'A' || a[i] == 'o' || a[i] == 'O' || a[i] == 'y' || a[i] == 'Y' || a[i] == 'e' || a[i] == 'E' || a[i] == 'u' || a[i] == 'U' || a[i] == 'i' || a[i] == 'I')
		{
			continue;
		}
		else
		{
			if (a[i] >= 'A'&&a[i] <= 'Z')
			{
				a[i] = a[i] + 32;
			}
			printf(".%c", a[i]);
		}
	}
	printf("n");
	return 0;
}

最后

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