How to string to integer in c++

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 31337

How to string to integer in c++

#include<string>
string str1 = "45"; 
string str2 = "3.14159"; 
string str3 = "31337 geek";

int myint1 = stoi(str1);
std::cout<<stoi(str1);

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);
}

Similar codes

0 vote294 views1 answer
Print number with leading zeros
C++
1 vote267 views1 answer
Il2cpp unity stuck c#
C++
8 votes267 views3 answers
Print to console c++
C++
3 votes306 views2 answers
C++ code for quicksort
C++
1 vote294 views1 answer
Swap using Function template in c++
C++
-1 vote272 views1 answer
Pointer to constant
C++
17 votes291 views2 answers
Convert string to char c++
C++
0 vote328 views1 answer
C++ fibo
C++
41 votes347 views6 answers
Print hello world c++
C++
1 vote278 views1 answer
C++ find in pair
C++