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#include <stdio.h>
#include "shape.h"
_rectangle::_rectangle(int width, int height) {
w = width; h = height;
}
void _rectangle::show_area() {
printf("area is %d\n", w * h);
}
_circle::_circle(int radius) { r = radius; }
void _circle::show_area() {
printf("area is %d pi\n", r * r);
}