View Compilation Error

0_0_38158616_22358.cpp: In function 'int main()':
0_0_38158616_22358.cpp:3:29: error: 'scanf' was not declared in this scope
    while(scanf("%d %d",&a,&b)!=EOF){
                             ^
0_0_38158616_22358.cpp:3:32: error: 'EOF' was not declared in this scope
    while(scanf("%d %d",&a,&b)!=EOF){
                                ^
0_0_38158616_22358.cpp:24:39: error: 'printf' was not declared in this scope
            printf("%d %d %d\n",a,b,max);
                                       ^