Hello, I need help solving this Lab simulation, It uses Whitespace Replace statements and I am very new at coding on this subject so I need help solving it.

Replace any space ' ' with '_' in 2-character string passCode. Sample output for the given program:

1_ 

#include

#include

#include

using namespace std;

int main() {

string passCode;

passCode = "1 ";

/* Your solution goes here*/

cout << passCode << endl;

return 0;

}