C语言程序设计课件（PROGRAMMING IN ANSI C）

main() {int h=10; float x1=2,y1=2,x2=-2,y2=2,x3=-2,y3=-2,x4=2,y4=-2; float x,y,d1,d2,d3,d4; printf("input a point(x,y):"); scanf("%f,%f",&x,&y); d1=(x-x1)*(x-x1)+(y-y1)*(y-y1); d2=(x-x2)*(x-x2)+(y-y2)*(y-y2); d3=(x-x3)*(x-x3)+(y-y3)*(y-y3); d4=(x-x4)*(x-x4)+(y-y4)*(y-y4); if (d1>1 && d2>1 && d3>1 && d4>1) h=0; printf("the point's height is %d",h); getch();}