0_0_37367546_22954.c: In function 'main':
0_0_37367546_22954.c:6:73: error: lvalue required as left operand of assignment
while(scanf("%lf%lf%lf%lf%lf%lf%lf%lf",&x1,&y1,&x2,&y2,&x3,&y3,&x4,&y4)=8)
^
0_0_37367546_22954.c:8:6: error: 'x' undeclared (first use in this function)
if(x[3]>a[2]&&x[3]>a[1]||x[3]>a[3]&&x[3]>a[4]||y[3]>b[1]&&y[3]>b[2]||y[3]>b[3]&&y[3]>b[4])
^
0_0_37367546_22954.c:8:6: note: each undeclared identifier is reported only once for each function it appears in
0_0_37367546_22954.c:8:11: error: 'a' undeclared (first use in this function)
if(x[3]>a[2]&&x[3]>a[1]||x[3]>a[3]&&x[3]>a[4]||y[3]>b[1]&&y[3]>b[2]||y[3]>b[3]&&y[3]>b[4])
^
0_0_37367546_22954.c:8:50: error: 'y' undeclared (first use in this function)
if(x[3]>a[2]&&x[3]>a[1]||x[3]>a[3]&&x[3]>a[4]||y[3]>b[1]&&y[3]>b[2]||y[3]>b[3]&&y[3]>b[4])
^
0_0_37367546_22954.c:8:55: error: 'b' undeclared (first use in this function)
if(x[3]>a[2]&&x[3]>a[1]||x[3]>a[3]&&x[3]>a[4]||y[3]>b[1]&&y[3]>b[2]||y[3]>b[3]&&y[3]>b[4])
^
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