408.cpp

C++实训教程

/*
	408.cpp  Written By S.Y.Feng
	DEMO implement one interface of  a group of functions
       by using function(return a Larger)  template
*/

#include <iostream.h>
#include <string.h>
#include <cstring.h>

char * Larger(char * x,char * y);
string Larger(string x,string y);
template  <class Type>  Type Larger(Type  a,Type  b);

main(void)
{
     int   i1 = 10 ,i2 = 20 ;
     cout << i1 << "  and  " << i2
     	  <<" The Larger is " << Larger(i1,i2) << endl;

     float f1 = 11.1, f2 = 2.2 ;
     cout << f1 << "  and  " << f2
     	  <<" The Larger is " << Larger(f1,f2) << endl;

     char  c1 = 'X', c2 = 'Y' ;
     cout << c1 << "  and  " << c2
     	  <<" The Larger is " << Larger(c1,c2) << endl;

     string s1="Wang", s2="Lee";
     cout << s1 << "  and  " << s2
     	  <<" The Larger is " << Larger(s1,s2) << endl;

     char * s3="AAA", * s4="bbb";
     cout << s3 << "  and  " << s4
     	  <<" The Larger is " << Larger(s3,s4) << endl;

     return 0;
}

template  <class Type>
Type Larger(Type a,Type b)
{
    if (a>b) return a;
    else  return b;
}

char * Larger(char * x,char * y)
{
	if (strcmp(x,y)>0) return x;
	else  return y  ;
}

string Larger(string x,string y)
{
	if (x>y) return x;
	else  return y  ;
}

/*上面程序运行的结果如下:
10  and  20 The Larger is 20
11.1  and  2.2 The Larger is 11.1
X  and  Y The Larger is Y
Wang  and  Lee The Larger is Wang
AAA  and  bbb The Larger is bbb

*/