traffic.cpp: In function 'int main()':
traffic.cpp:53:9: warning: unused variable 'a' [-Wunused-variable]
53 | int a, b;
| ^
traffic.cpp:53:12: warning: unused variable 'b' [-Wunused-variable]
53 | int a, b;
| ^
/tmp/ccE6CWjm.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccUvnria.o:traffic.cpp:(.text.startup+0x0): first defined here
/tmp/ccE6CWjm.o: In function `main':
grader.cpp:(.text.startup+0xd9): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status