y=0, what it will do is it will take the y field of pt structure and assign it to 0. So, the internal memory representation after executing the statements will be that pt is a structure; it has two sub fields - x and y, and x will be assign to 1 and y will be assign to 0. Struct point is the name is the data type, and pt is the name of the variable.
pt. y=0 ते असे लिहितात स्ट्रक्टर व्हेरिएबल चे नाव डॉट फील्ड चे नाव .