C++ String
在C++中，字符串是 std::string 类的对象，代表字符序列。我们可以对字符串执行许多操作，例如连接，比较，转换等。
C++字符串示例
让我们看一下C++字符串的简单示例。
#include <iostream>
using namespace std;
int main( ) {
string s1 = "Hello";
char ch[] = { 'C', '+', '+'};
string s2 = string(ch);
cout<<s1<<endl;
cout<<s2<<endl;
}
输出:
C++字符串比较示例
让我们看看使用strcmp()函数进行字符串比较的简单示例。
#include <iostream>
#include <cstring>
using namespace std;
int main ()
{
char key[] = "mango";
char buffer[50];
do {
cout<<"What is my favourite fruit? ";
cin>>buffer;
} while (strcmp (key,buffer) != 0);
cout<<"Answer is correct!!"<<endl;
return 0;
}
输出:
What is my favourite fruit? apple
What is my favourite fruit? banana
What is my favourite fruit? mango
Answer is correct!!
C++字符串连接示例
让我们看看使用strcat()函数进行字符串连接的简单示例。
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
char key[25], buffer[25];
cout << "Enter the key string: ";
cin.getline(key, 25);
cout << "Enter the buffer string: ";
cin.getline(buffer, 25);
strcat(key, buffer);
cout << "Key = " << key << endl;
cout << "Buffer = " << buffer<<endl;
return 0;
}
输出:
Enter the key string: Welcome to
Enter the buffer string: C++ Programming.
Key = Welcome to C++ Programming.
Buffer = C++ Programming.
C++字符串复制示例
让我们看一下使用strcpy()函数复制字符串的简单示例。
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
char key[25], buffer[25];
cout << "Enter the key string: ";
cin.getline(key, 25);
strcpy(buffer, key);
cout << "Key = "<< key << endl;
cout << "Buffer = "<< buffer<<endl;
return 0;
}
输出:
Enter the key string: C++ Tutorial
Key = C++ Tutorial
Buffer = C++ Tutorial
C++字符串长度示例
让我们看一下使用strlen()函数查找字符串长度的简单示例。
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
char ary[] = "Welcome to C++ Programming";
cout << "Length of String = " << strlen(ary)<<endl;
return 0;
}
输出:
C++字符串函数
