2.1. String0.h ¶
~cpp
//String0.h
#ifndef _STRING0_H_
#define _STRING0_H_
class String
{
private:
enum {LEN=70};
char st[LEN];
int n;
void n_set() {n=0;}//n 0
void lenstr() {while(st[n]!='\0') n++;}//문 를 n
public:
String();
String(const char *in_st);
~String();
char* stval() {return st;}// :배 리 * ..
int nval() const {return n;}//문 를 .
void reverse();//문
int search(char se);// 는 문
void delspace();//백
//
String operator+(const String &s) const;
//
friend ostream& operator<<(ostream &os, String &s);
};
#endif
2.2. String0.cpp ¶
~cpp
//String0.cpp
#include <iostream>
#include <cstring>
using namespace std;
#include "String0.h"
String::String()
{
n_set();
st[0]='\0';
}
String::String(const char *in_st)
{
n_set();
strncpy(st,in_st,LEN);
lenstr();
}
String::~String()
{
}
/*String::strlen() const
{
while(st[n]='\0')
{ n++;}
}*/
void String::reverse()
{
int k=nval();
char *temp=new char[k+2];
strncpy(temp,st,k+2);
for(int i=0;i<k;i++)
{
st[i]=temp[k-i-1];
st[k-i-1]=temp[i];
}
delete [] temp;//부 ...
}
int String::search(char se)
{
int number=0;
for(int i=0;i<n;i++)
{
if(st[i]==se)
number++;
}
return number;
}
void String::delspace()
{
for(int i=0;i<n;i++)
{
if(st[i]==' ')
for(int j=i;j<n;j++)
st[j]=st[j+1];
}
n_set();
lenstr();
}
String String::operator +(const String &s) const
{
String sum;
strncpy(sum.st,st,n);
for(int i=0;i<s.nval();i++)
sum.st[n+i]=s.st[i];
int n1=s.nval();// ;
sum.st[n+n1]='\0';// 리..
return sum;
}
ostream& operator<<(ostream &os, String &s)
{
os <<s.stval();
return os;
}
2.3. usestring.cpp ¶
~cpp
//usestring.cpp
#include <iostream>
using namespace std;
#include "String0.h"
int main()
{
String nam("nam sang boy");
String after=String(" is genius");
cout<<nam<<'\n';
cout<<after<<'\n'<<nam.nval()<<'\n';
String sum=nam+after;
cout<<sum<<'\n';
nam.reverse();// 리 뒤바뀌 는 문
cout<<nam<<'\n';
cout<<"nam class n 는 "<<nam.search('n')<<" \n";
nam.delspace();// 리는 문
cout<<nam<<'\n';
cout<<nam.nval()<<'\n';
String Test("The reverse function work well in English");
cout<<Test<<'\n';
Test.delspace();
cout<<Test<<'\n';
Test.reverse();
cout<<Test<<'\n';
return 0;
}
