~cpp
#include <iostream>
#include <fstream>
using namespace std;
void main()
{
ifstream fin("input.txt"); //형식은 3b11a같이
char ch;
int num;
do{
fin >> num; // 포인트...
fin.get(ch);
for ( int i = 0 ; i < num ; i++ )
cout << ch;
}while( !fin.eof() );
}
~cpp
#include <iostream>
using namespace std;
void main()
{
char ch;
ch = cin.get();
cout << ch;
char initial = ch;
do {
cout << initial - ch;
cin.get(initial);
}while(!(initial == '\n'));
}
~cpp
#include <iostream>
using namespace std;
void main()
{
char ch;
ch = cin.get();
cout << ch;
char initial = ch;
do {
cout << initial - ch;
cin.get(initial);
if((initial-ch>9||initial-ch<-9))
{
ch = initial;
cout << ch;
}
}while(!(initial == '\n'));
}