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#2
rjsp2018-08-10 14:06
 程序代码：#include <iostream> #include <cstring> using namespace std; template<typename T> T max( const T* a, size_t n ); template<> char* max<char*>( char* const a[], size_t n ); template<> const char* max<const char*>( const char* const a[], size_t n ); int main( void ) { int b[6] = { 1,2,3,4,5,6 }; double c[4] = {1.1,2.2,3.3,4.4}; cout << max(b,6) << endl; cout << max(c,4) << endl; const char* d[5] = {"a","bce","de","fg","a"}; cout << max(d,5) << endl; } template<typename T> T max( const T* a, size_t n ) { size_t index = 0; for( size_t i=1; i<n; ++i ) if( a[i] > a[index] ) index = i; return a[index]; } template<> char* max<char*>( char* const a[], size_t n ) { char* p = a[0]; size_t maxlen = strlen( p ); for( size_t i=1; i<n; ++i ) { size_t len = strlen( a[i] ); if( len > maxlen ) { maxlen = len; p = a[i]; } } return p; } template<> const char* max<const char*>( const char* const a[], size_t n ) { return max<char*>( const_cast<char**>(a), n ); } |
#include "stdafx.h"
#include<iostream>
#include<string>
#include<cstring>
#include<vector>
#include<array>
#include<ctime>
#include<fstream>
#include<cstdlib>
#include<cctype>
using namespace std;
template<typename T>
T max(T *a,int n);
template<> char *max<char *>(char *p[], int n);
int main()
{
int b[6] = { 1,2,3,4,5,6 };
double c[4] = {1.1,2.2,3.3,4.4};
const char *d[5] = {"a","bce","de","fg","a"};
cout << max(b,6) << endl;
cout << max(c,4) << endl;
cout << max(d, 5) << endl;
return 0;
}
template<typename T>
T max(T *a,int n)
{
T max = a[0];
for (int i = 1; i < n; i++)
{
if (a[i] > max)
max = a[i];
}
return max;
}
template<>char *max<char *>( char *p[], int n)
{
int max = strlen(p[0]);
char *t = p[0];
for (int i = 1; i < n; i++)
{
if (strlen(p[i]) > max)
{
max = strlen(p[i]);
t = p[i];
}
}
return t;
}
具体化的是返回最长的字符串的地址
标红的类型应该怎么写才能进入具体化。char **编译不能通过 char *又不是对应的类型