View Compilation Error

0_0_20881913_25408.cpp:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_20881913_25408.cpp: In function 'void f(int, int)':
0_0_20881913_25408.cpp:5:15: error: 'printf' was not declared in this scope
     printf("+"); 
               ^
0_0_20881913_25408.cpp: In function 'int main()':
0_0_20881913_25408.cpp:13:30: error: 'scanf' was not declared in this scope
     while(~scanf("%d%d",&n,&m)) 
                              ^
0_0_20881913_25408.cpp:18:23: error: 'printf' was not declared in this scope
             printf("|"); 
                       ^
0_0_20881913_25408.cpp:25:21: error: 'printf' was not declared in this scope
          printf("\n"); 
                     ^