View Compilation Error

0_0_26926488_10248.cpp:12:11: error: expected identifier before '(' token
 void union(int x, int y)
           ^
0_0_26926488_10248.cpp:12:12: error: expected unqualified-id before 'int'
 void union(int x, int y)
            ^
0_0_26926488_10248.cpp:12:12: error: expected ')' before 'int'
0_0_26926488_10248.cpp: In function 'int main()':
0_0_26926488_10248.cpp:30:4: error: expected primary-expression before 'union'
    union(x, y);
    ^