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#include <stdio.h> struct Parent { int x1, x2; }; struct Child : Parent { int y; }; int main() { Parent a; a.x1 = 50; a.x2 = 87; Child b; b.x1 = 78; b.x2 = 550; b.y = 101; Child* c = (Child*)&a; c->x1++; c = &b; c->y--; printf("*%d,%d,%d,%d,%d,%d,%d*\n", a.x1, a.x2, b.x1, b.x2, b.y, c->x1, c->x2); return 0; }