long long fibonacci(int n) { if (n == 0) return 0; if (n == 1) return 1; return fibonacci(n - 1) + fibonacci(n - 2); }
Standard input is empty
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/Scrt1.o: in function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status
Standard output is empty