View Compilation Error

0_0_24915378_30195.cpp: In function 'int main()':
0_0_24915378_30195.cpp:12:18: error: 'scanf' was not declared in this scope
     scanf("%d",&T);
                  ^
0_0_24915378_30195.cpp:18:24: error: 'printf' was not declared in this scope
         { printf("-1/n");
                        ^
0_0_24915378_30195.cpp:31:27: error: 'printf' was not declared in this scope
         printf("%d/n",Date);
                           ^