View Compilation Error

0_0_15988363_11347.cpp: In function 'int main()':
0_0_15988363_11347.cpp:11:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&T)&&T)  
                        ^
0_0_15988363_11347.cpp:39:28: error: 'printf' was not declared in this scope
         printf("%d\n",count);  
                            ^