View Compilation Error

0_0_36353581_271.cpp: In function 'void solve()':
0_0_36353581_271.cpp:195:26: error: 'q' was not declared in this scope
    scanf("%lf%lf%lf%lf",&q[i].x,&q[i].y,&q[i^1].x,&q[i^1].y);
                          ^
0_0_36353581_271.cpp:206:17: error: 'q' was not declared in this scope
      if(distant(q[i],q[j])<2*mid){
                 ^
0_0_36353581_271.cpp:206:26: error: 'distant' was not declared in this scope
      if(distant(q[i],q[j])<2*mid){
                          ^
0_0_36353581_271.cpp:214:17: error: 'q' was not declared in this scope
      if(distant(q[i],q[j])<2*mid){
                 ^
0_0_36353581_271.cpp:214:26: error: 'distant' was not declared in this scope
      if(distant(q[i],q[j])<2*mid){
                          ^