Is this the right way??

Question

Why is this code not asking for an input?
https://code.sololearn.com/cZD1e5zIG91W/#cpp

#include <iostream>

int main() {
int a= 10;
scanf("%d", &a);
printf("%d", a);
std::cout<<a;
return 0;
}

but just prints 1010
Compiler: https://code.sololearn.com/#cpp

Answer 1

Its not asking for input becoz the function which u used printf and scanf these are defined in stdio.h header file here u not include stdio.h but printf is printing 10 but its depend on Compilers or ide i tried in other ide its asking for input . May be some Compilers will give you warnings. Cpp is a superset lang. Of c so mostly cpp Compiler supporting c lang. features also so here u not getting errors or warning but your scanf part not working here.