1078. 字符串压缩与解压 (20)

#include <iostream>
#include <string>
using namespace std;

string a;

void deal1(){
	getline(cin, a);
	for(int i = 0; i < a.length(); i++)
	{
		int count = 0;
		while(a[i] == a[i+1])
			i++, count++;
		if(count != 0)	
			cout << count+1;
		cout << a[i];
	}	
}
void deal2(){
	getline(cin, a);
	for(int i = 0; i < a.length(); i++)
	{
		int sum = 0;
		while(a[i] <= '9' && a[i] >= '0')
			sum = sum*10 + a[i++]-'0';//数个数(两位以上的数字) 
		for(int j = 0; j < sum; j++)
			cout << a[i];
		if(sum == 0)
			cout << a[i];
	}
}
int main(){
	char ch;
	cin >> ch;
	
	getchar();//吞回车 
	
	if(ch == 'C')
		deal1();
	else if(ch == 'D')
		deal2();
	cout << endl;
	return 0;
}