View Compilation Error

0_0_30192821_29556.cpp:9:28: error: expected initializer before '?' token
 inline int gcd(int x,int y)?{
                            ^
0_0_30192821_29556.cpp: In function 'int main()':
0_0_30192821_29556.cpp:16:36: error: 'gcd' was not declared in this scope
    if(!gys[i][j]) gys[i][j]=gcd(i,j);
                                    ^