加密解密(ASCLL码)

#include <iostream>
#include <string>
using namespace std;
int main(int argc, char** argv) {
/*	string a;
	cin>>a;
	int b;
	char c;
	for(int i=0;i<a.size();i++){
		c=a[i];
		cout<<"第"<<i<<"位:"<<c<<endl;
		b=a[i];
		cout<<b<<endl;
		
	}
	cout<<a<<"加密后是:";
	for(int i=0;i<a.size();i++){
		b=a[i];
		cout<<b;
	}*/
	string a;
	int b;
	char c;
	cin>>a;
	while(a.size()>1){
		if(stoi(a.substr(0,2))>=65){
			b=stoi(a.substr(0,2));
			c=b;
			cout<<c;
			a=a.substr(2);
		}else{
			b=stoi(a.substr(0,3));
			c=b;
			cout<<c;
			a=a.substr(3);
		}
	}
	return 0;
}