A) struct TwoVals { int a, b; }; int main() { TwoVals.a = 10; TwoVals.b = 20; return 0; } B) #include using namespace std; struct ThreeVals { int a, b, c; void ThreeVals() {a = 1; b = 2; c = 3;} };...

A) struct TwoVals

{

int a, b;

};

int main()

{

TwoVals.a = 10;

TwoVals.b = 20;

return 0;

}

B) #include

using namespace std;

struct ThreeVals

{

int a, b, c;

void ThreeVals()

{a = 1; b = 2; c = 3;}

};

int main()

{

ThreeVals vals;

cout <>

return 0;

}