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#include <iostream>
using namespace std;
 
int main() {
	int commonDenominator(int x,int y){
 
        if(((x>y)?x:y) - ((x>y)?y:x) == 0)
            return (x<y)?x:y;
        else
            return commonDenominator(((x>y)?y:x), ((x>y)?x:y) - ((x>y)?y:x));
    }
    commonDenominator(252, 198)
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:5:36: error: a function-definition is not allowed here before ‘{’ token
  int commonDenominator(int x,int y){
                                    ^
prog.cpp:12:31: error: ‘commonDenominator’ was not declared in this scope
     commonDenominator(252, 198)
                               ^
prog.cpp:13:2: error: expected ‘;’ before ‘return’
  return 0;
  ^

Standard output is empty