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 vote242 views1 answer
Can you assign a value to a deleted pointer
C++
1 vote254 views1 answer
Memcpy c++ usage
C++
0 vote299 views1 answer
Variadic template constructor matches better than copy constructor
C++
0 vote273 views1 answer
F && T || !(T) && F
C++
1 vote322 views1 answer
What does the modularity mean in c++
C++
-1 vote301 views4 answers
Inline function in c++
C++
0 vote270 views1 answer
TCA9548 I2CScanner Arduino
C++
1 vote255 views1 answer
C++ check if string contains non alphanumeric
C++
2 votes276 views2 answers
Selection sort c++ algorithm
C++
2 votes271 views1 answer
Variable vs pointer in c++
C++