string to number in c++
// For C++11 and later versions
string str1 = "45";
string str2 = "3.14159";
string str3 = "31337 geek";
int myint1 = stoi(str1);
int myint2 = stoi(str2);
int myint3 = stoi(str3);
// Output
stoi("45") is 45
stoi("3.14159") is 3
stoi("31337 geek") is 31337convert string to number c++
#include <iostream>
#include <sstream>
using namespace std;
int main()
{
string str = "123456";
int n;
stringstream ( str ) >> n;
cout << n; //Output:123456
return 0;
}c++ string to int
// EXAMPLE
std::string sStringAsString = "789";
int iStringAsInt = atoi( sStringAsString.c_str() );
/* SYNTAX
atoi( <your-string>.c_str() )
*/
/* HEADERS
#include <cstring>
#include <string>
*/convert string to number c++
//stoi() : The stoi() function takes a string as an argument and
//returns its value. Supports C++11 or above.
// If number > 10^9 , use stoll().
#include <iostream>
#include <string>
using namespace std;
main() {
string str = "12345678";
cout << stoi(str);
}how to convert from string to int in c++
#include <iostream>
#include <sstream>
using namespace std;
int main() {
string s = "999";
stringstream degree(s);
int x = 0;
degree >> x;
cout << "Value of x: " << x;
}Copyright © 2021 Codeinu
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