C++字符串 一篇文章带你了解C++语法基础--字符串

#include <iostream>
using namespace std;

int main(){
    
    char wordOne = 'a';
    cout << int(wordOne) << endl;
    
    int number = 66;
    cout << char(number) << endl;
    
    return 0;
}

#include <iostream>
using namespace std;

int main(){
    
    int a = 'B'-'A';
    int b = 'A'*'B';
    char c = 'A'+2;
    
    cout << a << endl;
    cout << b << endl;
    cout << c << endl;
    
    return 0;
}

#include <iostream>
 
using namespace std;
 
int main ()
{
   char site[6] = {'G', 'e', 'e', 'k', 's', '\0'};
   cout << site << endl;
 
   return 0;
}

#include <iostream>
 
using namespace std;
 
int main ()
{
   char site[] = "Geeks";
   cout << site << endl;
 
   return 0;
}

#include <iostream>
#include <cstdio>
using namespace std;

int main(){
    
    char c;
    int number =0, chars = 0;
    
    while(cin>>c){
        if (c>='0' && c<='9') number++;
        else if (c >= 'A' && c<='Z' || c >= 'a' && c<= 'z') chars++;
    }
    
    printf("nums: %d\ncahrs: %d\n",number,chars);
    
    return 0;
}

#include <iostream>
#include <cstring>
 
using namespace std;
 
int main ()
{
   char str1[13] = "Say";
   char str2[13] = "Hello";
   char str3[13];
   int  len ;
 
   // 复制 str1 到 str3
   strcpy( str3, str1);
   cout << "strcpy( str3, str1) : " << str3 << endl;
 
   // 连接 str1 和 str2
   strcat( str1, str2);
   cout << "strcat( str1, str2): " << str1 << endl;
 
   // 连接后，str1 的总长度
   len = strlen(str1);
   cout << "strlen(str1) : " << len << endl;
 
   return 0;
}

#include <iostream>
#include <cstring>
 
using namespace std;
 
int main ()
{
    char str[100];
    //数组名即为数组的第一个元素的指针
    cin >> str+1;
    cout << str[1] << endl;
    
    return 0;
}

#include <iostream>
#include <string>

using namespace std;

int main(){
    
    string s1, s2;
    
    cin >> s1>> s2;
    cout << s1 << s2 << end;
    
    return 0;
}

#include <iostream>
#include <string>
using namespace std;

int main(){

    string s;
    getline(cin,s);
    cout << s << endl;
    
    return 0;
}