View Compilation Error

0_0_15911883_11152.cpp: In function 'int main()':
0_0_15911883_11152.cpp:9:2: error: expected initializer before 'scanf'
  scanf("%d",&t);
  ^
0_0_15911883_11152.cpp:13:3: error: 'sum' was not declared in this scope
   sum=0;
   ^