declaring strings c++
std::string str = "hello world";
char *str = "hello world";
char str[] = "hello world";
char str[11] = "hello world";declaring strings c++
std::string str = "hello world";
char *str = "hello world";
char str[] = "hello world";
char str[11] = "hello world";string in c++
#include <iostream>
#include <string>//for printing std::string
int main()
{
//A string is a group of characters and an array of const chars
const char* name = "Caleb";//C style string
//how string actually works below:
//String without null terminating character below:
char name2[5] = { 'C','a','l','e','b' };// string is just an array of characters
//The above doesn't have an null termination character at the end cout will not now where the string ends and will acess memory that is not a part of your string
std::cout << name2 << std::endl;//output => Caleb + somejunk //this is because null terminating char is not present at the end of array
//String with null terminating character below:
char name3[6] = { 'C','a','l','e','b','\0' };//null terminating char '\0' or '0' can be used
std::cout << name3 << std::endl;//output => Caleb // because null terminating char is present cout knows where array ends
//std::string class in c++ is takes an array of const chars and a bunch of functions to manuplate it:
//std::string has a constructor that takes const char array
std::string name4 = "Caleb";
name4.size();//gives size of string and there are many more methods in std::string class
//appending to std::string
//"Ever thing inside these double quotes becomes const char array"
//std::string namee = "Caleb" +"Hello";//This will give error because adding const char array to const char array
std::string namee = "Caleb";
namee += " Hello";//This will work because adding a ptr to a actual string
std::cout << namee << std::endl;
//You can also use the below
std::string namee2 = std::string("Caleb")+" Hello";// This will work because constructor will convert const char array to string, adding a ptr to string
std::cout << namee2 << std::endl;
std::cin.get();
}c++ string
#include <string>
std::string myString = "Hello, World!";c++ strings
#include <iostream>
using namespace std;
void display(char *);
void display(string);
int main()
{
string str1;
cout << "Enter a string: ";
getline(cin, str1);
display(str1);
return 0;
}
void display(string s)
{
cout << "Entered string is: " << s << endl;
}c++ write string
#include <iostream>
int main() {
std::cout << "Hello" << std::endl; //endl = end line/new line
// or
printf("hello");
}Copyright © 2021 Codeinu
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