View Compilation Error

0_0_20683858_5661.cpp: In function 'int main()':
0_0_20683858_5661.cpp:35:27: error: too few arguments to function 'bool scan_d(int&)'
             a[i] = scan_d();
                           ^
0_0_20683858_5661.cpp:14:13: note: declared here
 inline bool scan_d(int &num)
             ^