1 #include <iostream> 2 #include <cstring> 3 using namespace std; 4 5 void main() 6 { 7 auto fun = [](char *str)->int 8 { 9 int res = 0; 10 char *p = str; 11 int length = strlen(str); 12 for (int i = 0; i < length; i++) 13 { 14 res *= 2; 15 res += str[i] - '0'; 16 } 17 return res; 18 }; 19 20 char str[100]; 21 cin >> str; 22 cout << fun(str) << endl; 23 system("pause"); 24 }