View Compilation Error

0_0_25069446_14167.cpp: In function 'int main()':
0_0_25069446_14167.cpp:65:15: error: redeclaration of 'double t'
        double t = dist((node){0, 0}, a) / R;
               ^
0_0_25069446_14167.cpp:60:15: note: 'double t' previously declared here
        double t = dist((node){0, 0}, a);
               ^