View Compilation Error

0_0_22894333_3361.cpp: In function 'int f(int, int, int)':
0_0_22894333_3361.cpp:10:28: error: too few arguments to function 'int f(int, int, int)'
         return (a * f(n - 1) + b * f(n - 2))%7;
                            ^
0_0_22894333_3361.cpp:3:5: note: declared here
 int f(int n,int a,int b)
     ^
0_0_22894333_3361.cpp:10:43: error: too few arguments to function 'int f(int, int, int)'
         return (a * f(n - 1) + b * f(n - 2))%7;
                                           ^
0_0_22894333_3361.cpp:3:5: note: declared here
 int f(int n,int a,int b)
     ^