String Task

time limit per test2 seconds
memory limit per test256 megabytes
inputstandard input
outputstandard output
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
inputCopy
tour
outputCopy
.t.r
inputCopy
Codeforces
outputCopy
.c.d.f.r.c.s
inputCopy
aBAcAba
outputCopy
.b.c.b

问题简述：

  输入一个字符串，删除所有元音字母，将大写转成小写，在辅音字母前加".",输出修改后的字符串。

程序说明：

用string接收输入的字符串，方便删除，替换等字符串操作。输出处理后的字符串

程序实现：

#include<iostream>
#include<string>
using namespace std;
int main()
{
string str1;
while(cin>>str1)
{
for(int i=0;i<str1.size();i++)
{
if(str1[i]>64&&str1[i]<91) str1[i]+=32;
if(str1[i]=='a'||str1[i]=='o'||str1[i]=='y'||str1[i]=='e'||str1[i]=='u'||str1[i]=='i')
{
str1.erase(i,1);
i--;
}
}
for(int i=0;i<str1.size();i+=2)
{
str1.insert(i,1,'.');
}
cout<<str1<<endl;
}
}

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