View Compilation Error

0_0_31081980_27511.cpp: In function 'int main()':
0_0_31081980_27511.cpp:3:10: error: expected primary-expression before ',' token
  int a,b;,c,d;
          ^
0_0_31081980_27511.cpp:3:11: error: 'c' was not declared in this scope
  int a,b;,c,d;
           ^
0_0_31081980_27511.cpp:3:13: error: 'd' was not declared in this scope
  int a,b;,c,d;
             ^
0_0_31081980_27511.cpp:12:2: error: expected ';' before 'return'
  return 0;
  ^