View Compilation Error

0_0_23616094_20043.cpp: In function 'int main()':
0_0_23616094_20043.cpp:12:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&n)==1&&n)  
                        ^
0_0_23616094_20043.cpp:15:39: error: 'memset' was not declared in this scope
         memset(degree,0,sizeof(degree));  
                                       ^
0_0_23616094_20043.cpp:31:25: error: 'printf' was not declared in this scope
             printf("0\n");  
                         ^
0_0_23616094_20043.cpp:37:32: error: 'printf' was not declared in this scope
         if(cnt!=0) printf("0\n");  
                                ^
0_0_23616094_20043.cpp:38:26: error: 'printf' was not declared in this scope
         else printf("1\n");  
                          ^