Can you explain it?

Question

int i=2,j=1,k=3;
int w,q,r;
w=i,j,k;
q={i,j,k};
r=(i,j,k);
cout<<w<<q<<r;

Answer 1

it doesn't work.

error: cannot convert ‘<brace-enclosed initializer list>’ to ‘int’ in assignment
q = {i, j, k};

error: cannot convert ‘<brace-enclosed initializer list>’ to ‘int’ in assignment
q = {i, j, k}

error: expected ‘}’ before ‘;’ token
q = {i, j, k;}

error: expected ‘}’ before ‘;’ token
q = {i, j, k;};

Answer 2

this was asked in one quiz in sololearn