encoder.cpp: In function 'void encode(int, int*)':
encoder.cpp:5:20: error: 'send' was not declared in this scope
5 | if(M[i]==1)send(i);
| ^~~~
encoder.cpp: In function 'void decode(int, int, int*)':
encoder.cpp:14:20: error: 'output' was not declared in this scope
14 | if(b[i]==1)output(1);
| ^~~~~~
encoder.cpp:15:14: error: 'output' was not declared in this scope
15 | else output(0);
| ^~~~~~
/usr/bin/ld: /tmp/ccR2inhP.o: in function `main':
grader_decoder.cpp:(.text.startup+0x1ef): undefined reference to `decode(int, int, int*)'
collect2: error: ld returned 1 exit status