View Compilation Error

0_0_24686780_10031.cpp: In function 'int main()':
0_0_24686780_10031.cpp:6:14: error: 'canf' was not declared in this scope
  canf("%d",&T);
              ^
0_0_24686780_10031.cpp:11:42: error: 'n' was not declared in this scope
   printf("case #%d: %.10lf",casex++,1.0*(n-1));
                                          ^