fig05_29.cpp

来自「《c＋＋大学教程》源码」· C++ 代码 · 共 51 行

// Fig. 5.29: fig05_29.cpp
// Using strcat and strncat.
#include <iostream>

using std::cout;
using std::endl;

#include <cstring>   // prototypes for strcat and strncat

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

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

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

   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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