View Compilation Error

0_0_38158609_11258.cpp: In function 'int main()':
0_0_38158609_11258.cpp:3:23: error: 'scanf' was not declared in this scope
    scanf("%d %d",&a,&b);
                       ^
0_0_38158609_11258.cpp:24:37: error: 'printf' was not declared in this scope
            printf("%d %d %d",a,b,max);
                                     ^