View Compilation Error

0_0_31956952_18447.cpp: In function 'int main()':
0_0_31956952_18447.cpp:5:30: error: 'scanf' was not declared in this scope
     while (scanf("%d%d",&m,&n)!=EOF)
                              ^
0_0_31956952_18447.cpp:5:33: error: 'EOF' was not declared in this scope
     while (scanf("%d%d",&m,&n)!=EOF)
                                 ^
0_0_31956952_18447.cpp:44:40: error: 'printf' was not declared in this scope
         printf("%d %d %d\n",x+1,y+1,max);
                                        ^