View Compilation Error

0_0_36271717_20825.cpp: In function 'int main()':
0_0_36271717_20825.cpp:6:14: error: 't' was not declared in this scope
  scanf("%d",&t);
              ^
0_0_36271717_20825.cpp:12:31: error: 'n' was not declared in this scope
   a=(int *)malloc(sizeof(int)*n+1);
                               ^