View Compilation Error

0_0_20779995_14854.cpp: In function 'int main()':
0_0_20779995_14854.cpp:4:28: error: 'scanf' was not declared in this scope
 while(scanf("%d %d", &m, &n) != EOF)
                            ^
0_0_20779995_14854.cpp:4:33: error: 'EOF' was not declared in this scope
 while(scanf("%d %d", &m, &n) != EOF)
                                 ^
0_0_20779995_14854.cpp:15:11: error: 'printf' was not declared in this scope
 printf(" ");
           ^
0_0_20779995_14854.cpp:17:15: error: 'printf' was not declared in this scope
 printf("%d", m);
               ^
0_0_20779995_14854.cpp:22:14: error: 'printf' was not declared in this scope
 printf("no\n");
              ^
0_0_20779995_14854.cpp:24:12: error: 'printf' was not declared in this scope
 printf("\n");
            ^