Find the Errors in the C++ Programs

struct TwoVals

{

int a, b;

};

int main ()

{

TwoVals.a = 10;

TwoVals.b = 20;

return 0;

}

#include

using namespace std;

struct ThreeVals

{

int a, b, c;

};

int main()

{

ThreeVals vals = {1, 2, 3};

cout << vals << endl;

return 0;

}

#include

#include

using namespace std;

struct names

{

string first;

string last;

};

int main ()

{

names customer = "Smith", "Orley";

cout << names.first << endl;

cout << names.last << endl;

return 0;

}