第一题

String Task
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.
问题简述：输入一串字符，输出辅音字母，大写换小写，输出辅音字母之前加“.”
程序说明：检查输入字符，如果是元音字母，不记录，如果是辅音字母，判断大小写，小写直接记录，大写的话转化小写再记录，最后加“."输出
AC代码
#include
using namespace std;
int main()
{
char a[101], b[210];
cin >> a;
int i = 0, i2 = 0;
for(;i<strlen(a);i++)
{
if (a[i] != ‘a’&&a[i] != ‘A’&&a[i] != ‘e’&&a[i] != ‘E’&&a[i] != ‘i’&&a[i] != ‘I’&&a[i] != ‘o’&&a[i] != ‘O’&&a[i] != ‘u’&&a[i] != ‘U’&&a[i] != ‘y’&&a[i] != ‘Y’)
{
if (a[i] >= ‘B’&&a[i] <= ‘Z’)
{
a[i] = a[i] + 32;
}
b[i2] = ‘.’;
b[i2 + 1] = a[i];
i2 += 2;
}
}
b[i2] = 0;
cout << b;
}

最后

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