how can make string value in cpp
#include <string>
string hello= "hello you thre :)";
how can make string value in cpp
#include <string>
string hello= "hello you thre :)";
c++ string
#include <string>
#include <iostream>
#include <type_traits>
#include <cstring>
int main() {
std::string str = "Hello, there";
std::cout << std::boolalpha
<< str.capacity() << ", " << str.size() << ", " << std::strlen(str.data()) // 12, 12, 12
<< 'n' << std::is_same_v<std::string, std::basic_string<char>> // true
<< 'n' << str.front() + str.substr(1, 10) + str.back() // Hello there
<< 'n' << str[0] // H
<< 'n';
str += "!";
std::cout << str << 'n'; // Hello, there!
str.erase(4, 4); // Hellhere!
str.pop_back(); // Hellhere
str.insert(4, " "); // Hell here
std::cout << str << 'n'; // Hell here
}
string in cpp
// you want to include <string>
#include <string>
#include <iostream>
int main()
{
string helloWorld = "Hello World!"; // creating string and assigning
std::cout << helloWorld; // will output what you assigned it!
/* you can also use strings with user
input (cin/getline)*/
string namePerson{};
getline(cin, namePerson); // getline allows for multi word input
std::cout << namePerson; // outputs name which person inputted
}
string c++
#include <string>
std::begin | returns an iterator to the beginning of a container
std::end | returns an iterator to the end of a container
std::size | returns the length of string
std::to_string | converts a number to string
std::stoi | converts a string to a signed integer
std::getline | read data from an I/O stream into a string
std::swap | specializes the std::swap algorithm
std::empty | checks whether the container is empty
c++ string manipulation
/*
OUTPUT
String value: Programming {where applicable: -31.05}
-----------------------------------------------------------------------------
|Programming| << [No manipulation]
| Programming| << [Width:20][align:string_default=right]
| Programming| << [Width:20][align:right]
|Programming | << [Width:20][align:left]
|-31.05 | << [Width:20][align:int_default=left]
|- 31.05| << [Width:20][align:internal]
|.........Programming| << [Width:20][align:default][fill:.]
|+++++++++Programming| << [Width:20][align:default][fill:+]
|=========Programming| << [Width:20][align:default][fill:=]
-----------------------------------------------------------------------------
*/
string sString = "Programming"; // Length = 11
//NOTE: always place the settings before the actual string in cout
// width
cout << "|" << sString << "|" << "tt << [No manipulation]" << endl;
cout << "|" << setw(20) << sString << "|" << "t << [Width:20][align:string_default=right]n";
// alignment
cout << "|" << setw(20) << right << sString << "|" << "t << [Width:20][align:right]n";
cout << "|" << setw(20) << left << sString << "|" << "t << [Width:20][align:left]n";
cout << "|" << setw(20) << -31.05 << "|" << "t << [Width:20][align:int_default=left]n";
cout << "|" << setw(20) << internal << -31.05 << "|" << "t << [Width:20][align:internal]n";
// fill (HAVE to use single quotes in the setfill argument definition)
cout << "|" << setw(20) << setfill('.') << sString << "|" << "t << [Width:20][align:default][fill:.]n";
cout << "|" << setw(20) << setfill('+') << sString << "|" << "t << [Width:20][align:default][fill:+]n";
cout << "|" << setw(20) << setfill('=') << sString << "|" << "t << [Width:20][align:default][fill:=]n";
c++ write string
#include <iostream>
int main() {
std::cout << "Hello" << std::endl; //endl = end line/new line
// or
printf("hello");
}
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