fig08_32.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. 8.32: fig08_32.cpp
// Using strcat and strncat.
#include <iostream>
using std::cout;
using std::endl;

#include <cstring> // prototypes for strcat and strncat
using std::strcat;                                     
using std::strncat;                                     

int main()
{
   char s1[ 20 ] = "Happy "; // length 6
   char s2[] = "New Year "; // length 9
   char s3[ 40 ] = "";

   cout << "s1 = " << s1 << "\ns2 = " << s2;

   strcat( s1, s2 ); // concatenate s2 to s1 (length 15)

   cout << "\n\nAfter strcat(s1, s2):\ns1 = " << s1 << "\ns2 = " << s2;

   // concatenate first 6 characters of s1 to s3
   strncat( s3, s1, 6 ); // places '\0' after last character

   cout << "\n\nAfter strncat(s3, s1, 6):\ns1 = " << s1 
      << "\ns3 = " << s3;

   strcat( s3, s1 ); // concatenate s1 to s3  
   cout << "\n\nAfter strcat(s3, s1):\ns1 = " << s1 
      << "\ns3 = " << s3 << endl;
   return 0; // indicates successful termination
} // end main

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