delete.cpp

来自「C++ Primer Plus（第五版）第4章例题代码」· C++ 代码 · 共 31 行

// delete.cpp -- using the delete operator
#include <iostream>
#include <cstring>      // or string.h
using namespace std;
char * getname(void);   // function prototype
int main()
{
    char * name;        // create pointer but no storage

    name = getname();   // assign address of string to name
    cout << name << " at " << (int *) name << "\n";
    delete [] name;     // memory freed

    name = getname();   // reuse freed memory
    cout << name << " at " << (int *) name << "\n";
    delete [] name;     // memory freed again
    return 0;
}

char * getname()        // return pointer to new string
{
    char temp[80];      // temporary storage
    cout << "Enter last name: ";
    cin >> temp;
    char * pn = new char[strlen(temp) + 1];
    strcpy(pn, temp);   // copy string into smaller space

    return pn;          // temp lost when function ends
}