C++實驗(二)

認真閱讀下面的代碼，並更改錯誤，得到合理的結果

// Debugging Problem

#include <iostream>

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

#include <cstring>

void initialize( char [], int * );
void input( const char [], int & );
void print( const char *, const int );
void growOlder( const char [], int * );
bool comparePeople( const char *, const int *,
                    const char *, const int * );
void add(int &, int=5);

int main()
{
   char name1[ 25 ]; 
   char name2[ 25 ];
   int age1;
   int age2;

   initialize( name1, &age1 );
   initialize( name2, &age2 );

   print( name1, *age1 );
   print( name2, *age2 );

   input( name1, age1 );
   input( name2, age2 );

   print( &name1, &age1Ptr );
   print( &name2, &age1Ptr );

   growOlder( name2, age2 );

   if ( comparePeople( name1, &age1, name2, &age2 ) )
      cout << "Both people have the same name and age"
           << endl;

   return 0;

} // end main

// function input definition
void input( const char name[], int &age )
{
   cout << "Enter a name: ";
   cin >> name;

   cout << "Enter an age: ";
   cin >> age;
   cout << endl;

} // end function input

// function initialize definition
void initialize( char name[], int *age )
{
   name = "";
   age = 0;

} // end function initialize

// function print definition
void print( const char name[], const int age )
{
   cout << "The value stored in variable name is: "
        << name << endl
        << "The value stored in variable age is: "
        << age << endl << endl;

} // end function print

// function growOlder definition
void growOlder( const char name[], int *age )
{
   cout << name << " has grown one year older\n\n";
   *age++;

} // end function growOlder

// function comparePeople definition
bool comparePeople( const char *name1, const int *age1,
                    const char *name2, const int *age2 )
{
   return ( age1 == age2 && strcmp( name1, name2 ) );

} // end function comparePeople

void add(int &a, int num=5)
{
    a += num;
}

q
&
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以下爲更改後代碼(僅供參考):

// Debugging Problem

#include <iostream>

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

#include <cstring>

void initialize( char [], int * );
void input( char [], int & );
void print( const char *, const int );
void growOlder( const char [], int& );
bool comparePeople( const char *, const int , const char *, const int  );
void add(int &, int);

int main()
{
    char name1[ 25 ];
    char name2[ 25 ];
    int age1;
    int age2;

    initialize( name1, &age1 );
    initialize( name2, &age2 );

    print( name1, age1 );
    print( name2, age2 );

    input( name1, age1 );
    input( name2, age2 );

    print( name1, age1 );
    print( name2, age2 );

    growOlder( name2, age2 );

    if ( comparePeople( name1, age1, name2, age2 ) )
        cout << "Both people have the same name and age" << endl;

    return 0;

} // end main

// function input definition
void input( char name[], int &age )
{
    cout << "Enter a name: ";
    cin >> name;

    cout << "Enter an age: ";
    cin >> age;
    cout << endl;

} // end function input

// function initialize definition
void initialize( char name[], int *age )
{
    strcpy(name,"");
    *age = 0;

} // end function initialize

// function print definition
void print( const char name[], const int age )
{
    cout << "The value stored in variable name is: "
    << name << endl
    << "The value stored in variable age is: "
    << age << endl << endl;

} // end function print

// function growOlder definition
void growOlder( const char name[], int& age )
{
    cout << name << " has grown one year older\n\n";
    age++;

} // end function growOlder

// function comparePeople definition
bool comparePeople( const char *name1, const int age1, const char *name2, const int age2 )
{
    return ( age1 == age2 && !strcmp( name1, name2 ) );

} // end function comparePeople

void add(int &a, int num=5)
{
    a += num;
}

(內容大多源自老師講課)