View Compilation Error

0_0_13486296_27063.cpp: In function 'int main()':
0_0_13486296_27063.cpp:4:13: error: expected initializer before '.' token
      int a,b.sum;
             ^
0_0_13486296_27063.cpp:5:23: error: 'b' was not declared in this scope
      scanf("%d%d",&a,&b);
                       ^
0_0_13486296_27063.cpp:6:6: error: 'sum' was not declared in this scope
      sum=a+b;
      ^