fig18_06.cpp

是有关C++编程原理教程的例子程序,全,应该对大家有所帮助

// Fig. 18.6: Fig18_06.cpp
// Demonstrating the string find member functions.
#include <iostream>
using std::cout;
using std::endl;

#include <string>
using std::string;

int main()
{
   string string1( "noon is 12 pm; midnight is not." );
   int location;
   
   // find "is" at location 5 and 25
   cout << "Original string:\n" << string1 
      << "\n\n(find) \"is\" was found at: " << string1.find( "is" ) 
      << "\n(rfind) \"is\" was found at: " << string1.rfind( "is" );

   // find 'o' at location 1
   location = string1.find_first_of( "misop" );
   cout << "\n\n(find_first_of) found '" << string1[ location ]
      << "' from the group \"misop\" at: " << location;
   
   // find 'o' at location 29
   location = string1.find_last_of( "misop" );
   cout << "\n\n(find_last_of) found '" << string1[ location ] 
        << "' from the group \"misop\" at: " << location;
   
   // find '1' at location 8 
   location = string1.find_first_not_of( "noi spm" );
   cout << "\n\n(find_first_not_of) '" << string1[ location ]
      << "' is not contained in \"noi spm\" and was found at:" 
      << location;
   
   // find '.' at location 12
   location = string1.find_first_not_of( "12noi spm" );
   cout << "\n\n(find_first_not_of) '" << string1[ location ]
      << "' is not contained in \"12noi spm\" and was " 
      << "found at:" << location << endl;

   // search for characters not in string1
   location = string1.find_first_not_of( 
      "noon is 12 pm; midnight is not." );
   cout << "\nfind_first_not_of(\"noon is 12 pm; midnight is not.\")"  
      << " returned: " << location << endl;
   return 0;
} // end main

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