change from str to int in c++ code example
Example 1: 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
Example 2: c++ string to int
atoi( str.c_str() )