View Compilation Error

0_0_17607245_4055.cpp: In function 'int main()':
0_0_17607245_4055.cpp:6:14: error: 't' was not declared in this scope
  scanf("%d",&t);
              ^
0_0_17607245_4055.cpp:6:15: error: expression list treated as compound expression in initializer [-fpermissive]
  scanf("%d",&t);
               ^
0_0_17607245_4055.cpp:9:15: error: 'n' was not declared in this scope
   scanf("%d",&n);
               ^
0_0_17607245_4055.cpp:9:16: error: 'scanf' cannot be used as a function
   scanf("%d",&n);
                ^
0_0_17607245_4055.cpp:11:7: error: 'i' was not declared in this scope
   for(i=1;i<n;i++)
       ^
0_0_17607245_4055.cpp:13:8: error: 'j' was not declared in this scope
    for(j=0;j<=i;j++)
        ^
0_0_17607245_4055.cpp:14:4: error: 'a' was not declared in this scope
    a[i]=i%10;
    ^