View Compilation Error

0_0_33821472_9004.cpp: In function 'int main()':
0_0_33821472_9004.cpp:14:13: error: expected primary-expression before '%' token
  scanf("%d",%a);
             ^
0_0_33821472_9004.cpp:17:20: error: expected primary-expression before '%' token
   scanf("%d%d%d%d",%s,&d,&f,&g);
                    ^
0_0_33821472_9004.cpp:21:15: error: expected primary-expression before '%' token
    scanf("%d",%w[i]);
               ^