main.cpp

对于c++primer中前面几章的练习以及书上的例子

#include <cstdlib>
#include <iostream>
#include<cstring>
using namespace std;

int main(int argc, char *argv[])
{
   /* int errors=0;
    const char*pc="a very long string";
    for(int ix=0;ix<10;++ix)
    {
    int len=strlen(pc);
     char *pc2=new char[len+1];
     strcpy(pc2,pc);
     cout<<pc2<<endl;   
     if(strcmp(pc2,pc))
     ++errors;
     delete []pc2;   
      
    }
    cout<<"c_style character strings:"<<errors<<"errors occurred.\n";*/
    
    int errors=0;
    string str("a very string");
    for(int ix=0;ix<1000000;++ix)
    {
            int len=str.size();
            string str2=str;
            if(str!=str2)
            ++errors;
            cout<<str2<<endl;
    }
    cout<<"c_style character strings:"<<errors<<"errors occurred.\n";
    
    system("PAUSE");
    return EXIT_SUCCESS;
}