字符串的合并

#ifndef _STRING_H_
#endif  _STRING_H_
//#pragma once  //此句与头两句效果相同

#include<iostream>
using namespace std;

#define MAX_STRING_SIZE 10  //合并后存放字符串的空间大小,可以比第一的字符串长度小

typedef char SString[MAX_STRING_SIZE+1];

#define MAX_STRING_SIZE1 6  //单个字符的长度

typedef char SString1[MAX_STRING_SIZE1+1];

int Length(SString s)
{
	return strlen(s);
}

bool StringConcat(SString T, SString1 s1, SString1 s2)//字符串链接
{
	int t_length = MAX_STRING_SIZE;
	int s1_length = Length(s1);
	int s2_length = Length(s2);

	if(t_length >= s1_length+s2_length)
	{
		for(int i=0; i<s1_length; ++i)
		{
			T[i] = s1[i];
		}
		for(int j=0; j<s2_length; ++j)
		{
			T[i+j] = s2[j];
		}
		T[i+j] = '\0';
		return true;
	}
	else if(t_length>s1_length && t_length<s1_length+s2_length)
	{
		for(int i=0; i<s1_length; ++i)
		{
			T[i] = s1[i];
		}
		for(int j=0; j<t_length-s1_length; ++j)
		{
			T[i+j] = s2[j];
		}
		T[i+j] = '\0';
		return false;

	}
 	else if(t_length < s1_length)  /////
	{
			for(int i=0; i<t_length; ++i)
		{
			T[i] = s1[i];
		}
			T[i] = '\0';
			return false;
	}
	return true;
}

void PrintString(char T[])
{
	cout<<T<<endl;
}

#include"string.h"

void main()
{
	SString T;
	SString1 s1 = "hello ";
	SString1 s2 = "world!";
	StringConcat(T,s1,s2);
	PrintString(T);
}