Foro de elhacker.net

//"Toying around with strings and vars"
 
#include <iostream>
#include <string>
using namespace std;
 
int main()
{
	//declaring strings and vars
	string str1, str2, str3;
	char testchar1;
	int count, pos;
 
	//setting initial strings
	str1 = "This is a test String";
	str2 = "One";
 
	//playing with size instructions
	cout << "Size: " << str1.size() << endl;
	cout << "Capacity: " << str1.capacity() << " (Before reserve)" << endl;
	str1.reserve(64);
	str2.reserve(64);
	cout << "Capacity: " << str1.capacity() << " (After reserve)" << endl;
 
	//Toying with 'at' instruction
	cout << "Chars per position:" << endl;
	cout << "--" << endl;
	for (size_t count=0; count < str1.length(); count++)
	{
		cout << "[" << count << "] -> " << str1.at(count) << endl;
	}
 
	cout << "\n";
 
	//Testing append instruction
	cout << "str1 contains: " << str1 << endl;
	cout << "str2 contains: " << str2 << endl;
	str2.append(4,'-');
	str2.append("Two");
	cout << "Now, str2: " << str2 << endl;
 
	//Swapping the content of str1 and str2
	str1.swap (str2);
	cout << "After a swap: \n";
	cout << "str1 contains: " << str1 << endl;
	cout << "str2 contains: " << str2 << endl;
 
	//Experimenting with find and substr	
	pos = str1.find("String");
	str3 = str1.substr (pos);
 
	cout << "I found the word: " << str3 << endl;
	cout << "It starts at position: " << pos << endl;
 
	//Trying out string comparison:
	//int compare ( size_t pos1, size_t n1, const string& str, size_t pos2, size_t n2 )
	if (str3.compare(0,6,str2,14,6))
		cout << "Found " << str3 << " into " << str1 << endl;
 
	if (str1.compare(0,3,str3,0,6))
		cout << "Weird... I found " << str2 << " into " << str3 << "!\n";
	else
		cout << "Didn't find " << str2 << " into " << str3 << endl;
 
	return 0;
}

Size: 21
Capacity: 21 (Before reserve)
Capacity: 64 (After reserve)
Chars per position:
--
[0] -> T
[1] -> h
[2] -> i
[3] -> s
[4] ->
[5] -> i
[6] -> s
[7] ->
[8] -> a
[9] ->
[10] -> t
[11] -> e
[12] -> s
[13] -> t
[14] ->
[15] -> S
[16] -> t
[17] -> r
[18] -> i
[19] -> n
[20] -> g

str1 contains: This is a test String
str2 contains: One
Now, str2: One----Two
After a swap:
str1 contains: One----Two
str2 contains: This is a test String

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

//Experimenting with find and substr