俺是新手，菜鸟一个，刚学C++，
刚编了个字符相加的程序，功能是，将两个字符相加，例如：输入hello,和world两个字符，便输出helloworld
可是总是出错，用strcpy,和strcat函数时，也报错；
最后，编译时没错，可是运行不了，着实郁闷，望哪位高手，帮忙写个程序，让俺看看
谢谢了先！

Example

/* STRCPY.C: This program uses strcpy
* and strcat to build a phrase.
*/

#include <string.h>
#include <stdio.h>

void main( void )
{
char string[80];
strcpy( string, "Hello world from " );
strcat( string, "strcpy " );
strcat( string, "and " );
strcat( string, "strcat!" );
printf( "String = %s\n", string );
}

Output

String = Hello world from strcpy and strcat!

[此贴子已经被作者于2006-11-23 8:34:36编辑过]

#include <iostream>
#include <string>

using namespace std;

void main ()
{
char char1[15];
char char2[15];

cout << "Enter the first Character string:";
cin >> char1;
cout << "Enter the second Character string:";
cin >> char2;

int len = strlen ( char1 ) + strlen ( char2 );
char *char3 = new char[len + 1];
strcpy ( char3, char1 );
strcat ( char3, char2 );

cout << "New Character string After Merge:" << char3;
}

[此贴子已经被作者于2006-12-18 23:06:57编辑过]

那顺便帮我看看下面的程序怎么总是出错：

#include <iostream.h>
#include <string.h>
class zf
{
char * str;
public:
void input()
{
cout<<"输入字符:"<<endl;
cin>>str;
}
void print()
{
cout<<str<<endl;
}
~zf()
{
delete str;
}

friend zf operator + (zf &a,zf &b);
};
zf operator + (zf &a,zf &b)
{
zf temp;
delete temp.str;
temp.str=new char [strlen(a.str)+strlen(b.str)+1];
strcpy(temp.str,a.str);
strcat(temp.str,b.str);
return temp;
}
main()
{
zf a ,b,c;
a.input();
b.input();
c=b+a;
c.print();
return 0;
}

拜托了！！！！！

应该是使用字符串数组吧，资源分配方面有问题~~~~
建议使用string，而不是char*:

#include <iostream>
#include <string>

using namespace std;

class MyClass{
string str;
public:
MyClass(){}
MyClass(const string& str_):str(str_){}

void input(){
cout<<"please input a string: ";
cin>>str;
}

void print() const{
cout<<"The result: ";
cout<<str<<endl;
}

friend MyClass operator+(const MyClass &a,const MyClass &b){
return MyClass(a.str+' '+b.str);
}

~MyClass(){}
};

int main(){
MyClass a,b,c;
a.input();
b.input();

c=a+b;
c.print();

return 0;
}

哇嘶！7楼的你好厉害，真的可以了，
可是我经过以下变化就错了好多错误，拜托帮我解释：

#include <iostream.h> // 这里改变了
#include <string.h>

//using namespace std;

class MyClass{
string str;
public:
MyClass(){}
MyClass(const string& str_):str(str_){}

void input(){
cout<<"please input a string: ";
cin>>str;
}

void print() const{
cout<<"The result: ";
cout<<str<<endl;
}

friend MyClass operator+(const MyClass &a,const MyClass &b){
return MyClass(a.str+' '+b.str);
}

~MyClass(){}
};

int main(){
MyClass a,b,c;
a.input();
b.input();

c=a+b;
c.print();

return 0;
}