View Compilation Error

0_0_20574012_6543.cpp:4:2: error: expected primary-expression before 'int'
  int a,i,n;
  ^
0_0_20574012_6543.cpp:4:2: error: expected '}' before 'int'
0_0_20574012_6543.cpp:4:2: error: expected ',' or ';' before 'int'
0_0_20574012_6543.cpp:5:7: error: expected constructor, destructor, or type conversion before '(' token
  scanf("%d",n);
       ^
0_0_20574012_6543.cpp:6:2: error: 'a' does not name a type
  a=1;
  ^
0_0_20574012_6543.cpp:7:2: error: expected unqualified-id before 'for'
  for(i=0,i<n,i++)
  ^
0_0_20574012_6543.cpp:12:8: error: expected constructor, destructor, or type conversion before '(' token
  printf("%d",a);
        ^
0_0_20574012_6543.cpp:13:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_20574012_6543.cpp:14:1: error: expected declaration before '}' token
 }
 ^