c++ 访问字符的元素的STL字符串

[c++]代码库

// 访问字符的元素的STL字符串
#include <string>
#include <iostream>

int main() {
	using namespace std;

	// The sample string
	string strSTLString("Hello String");

	// Access the contents of the string using array syntax
	cout << "Displaying characters using array-syntax: " << endl;
	for (size_t nCharCounter = 0; nCharCounter < strSTLString.length();
			++nCharCounter) {
		cout << "Character [" << nCharCounter << "] is: ";
		cout << strSTLString[nCharCounter] << endl;
	}
	cout << endl;

	// Access the contents of a string using iterators
	cout << "Displaying characters using iterators: " << endl;
	int nCharOffset = 0;
	string::const_iterator iCharacterLocator;
	for (iCharacterLocator = strSTLString.begin()
	; iCharacterLocator != strSTLString.end(); ++iCharacterLocator) {
		cout << "Character [" << nCharOffset++ << "] is: ";
		cout << *iCharacterLocator << endl;
	}
	cout << endl;

	// Access the contents of a string as a C-style string
	cout << "The char* representation of the string is: ";
	cout << strSTLString.c_str() << endl;

	return 0;
}