View Compilation Error

0_0_30468126_23064.cpp: In function 'int main()':
0_0_30468126_23064.cpp:18:2: error: expected initializer before 'scanf'
  scanf("%d", &t);
  ^
0_0_30468126_23064.cpp:19:8: error: 't' was not declared in this scope
  while(t--){
        ^