foo.cc: In function 'int main()':
foo.cc:9:67: error: too few arguments to function 'long long int power(int, int, int)'
     cout << a << '^' << b << " mod " << p << '=' << power(a % p, b) % 10;
                                                                   ^
foo.cc:4:11: note: declared here
 long long power(int a, int b,int m);
           ^~~~~
foo.cc: In function 'long long int power(int, int, int)':
foo.cc:18:32: error: too few arguments to function 'long long int power(int, int, int)'
         result = power(a, b - 1)%m * a;
                                ^
foo.cc:14:11: note: declared here
 long long power(int a, int b,int m)
           ^~~~~
foo.cc:21:32: error: too few arguments to function 'long long int power(int, int, int)'
         result = power(a, b / 2)%m * power(a, b / 2)%m;
                                ^
foo.cc:14:11: note: declared here
 long long power(int a, int b,int m)
           ^~~~~
foo.cc:21:52: error: too few arguments to function 'long long int power(int, int, int)'
         result = power(a, b / 2)%m * power(a, b / 2)%m;
                                                    ^
foo.cc:14:11: note: declared here
 long long power(int a, int b,int m)
           ^~~~~

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