C++ 教程目录

String 类和标准模板库

str2.cpp

来源: String 类和标准模板库

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原始代码预览

// str2.cpp -- capacity() and reserve()
#include <iostream>
#include <string>
int main()
{
    using namespace std;
    string empty;
    string small = "bit";
    string larger = "Elephants are a girl's best friend";
    cout << "Sizes:\n";
    cout << "\tempty: " << empty.size() << endl;
    cout << "\tsmall: " << small.size() << endl;
    cout << "\tlarger: " << larger.size() << endl;
    cout << "Capacities:\n";
    cout << "\tempty: " << empty.capacity() << endl;
    cout << "\tsmall: " << small.capacity() << endl;
    cout << "\tlarger: " << larger.capacity() << endl;
    empty.reserve(50);
    cout << "Capacity after empty.reserve(50): " 
         << empty.capacity() << endl;
	// cin.get();
    return 0;
}
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