View Compilation Error

0_0_27109977_17551.cpp: In function 'int main()':
0_0_27109977_17551.cpp:4:32: error: 'scanf' was not declared in this scope
     while(scanf("%lf %lf",&m,&n) != EOF)
                                ^
0_0_27109977_17551.cpp:4:37: error: 'EOF' was not declared in this scope
     while(scanf("%lf %lf",&m,&n) != EOF)
                                     ^
0_0_27109977_17551.cpp:18:32: error: 'printf' was not declared in this scope
                 {printf("%d ",i);
                                ^
0_0_27109977_17551.cpp:25:26: error: 'printf' was not declared in this scope
             printf("no\n");
                          ^