View Compilation Error

0_0_36979307_19176.cpp: In function 'int main()':
0_0_36979307_19176.cpp:17:11: error: unable to find numeric literal operator 'operator""l5'
      if(i<0l5) printf("%d\n",digui(i));
           ^
0_0_36979307_19176.cpp:17:11: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_36979307_19176.cpp:64:20: error: 'getchat' was not declared in this scope
     }while(getchat()!=EOF);
                    ^