字符处理,设计字符串连接,比较函数,并用主函数调试

连接
#include<iostream>
#include<string>
using namespace std;
int main()
{
const string str1("I am a hardwork ");
cout<<str1<<endl;
const string str2("student");
cout<<str2<<endl;
string result_str=str1;
result_str+=str2;
cout<<result_str<<endl;
return 0;
}
比较
#include<iostream.h>
#include <string.h>

//字符串输入函数
void str_input(char *p1,char *p2)
{
cout<<"string1:";
cin>>p1;
cout<<"string2:";
cin>>p2;
}

//显示strcmp()函数的比较结果
void strcmp_put(char *p1,char *p2)
{
cout<<"strcmp():"<<endl;
int result=strcmp(p1,p2);
if (result>0)
cout<<p1<<" greater than "<<p2<<endl;
if (res