Why do i need to include the header #include<string> when its already contained in #include<iostream> header. Below...

Question

#include <iostream>
#include <string>
using namespace std;

class myClass {
public:
void setName(string x) {
name = x;
}
private:
string name;
};

int main() {
myClass myObj;
myObj.setName("John");

return 0;
}
is it ok even if i exclude the line 2. help

Answer 1

You can easily have a situation where <string> is needed without needing <iostream>. You'll often run into headers that include other supporting headers for you. That's why it's common practice to use guard definitions.