View Compilation Error

0_0_14928058_27506.cpp: In function 'int main()':
0_0_14928058_27506.cpp:4:30: error: 'scanf' was not declared in this scope
     while(scanf("%d%d",&m, &n)!=EOF)
                              ^
0_0_14928058_27506.cpp:4:33: error: 'EOF' was not declared in this scope
     while(scanf("%d%d",&m, &n)!=EOF)
                                 ^
0_0_14928058_27506.cpp:14:30: error: 'printf' was not declared in this scope
                 printf("%d",j);
                              ^
0_0_14928058_27506.cpp:19:18: error: 'printf' was not declared in this scope
     printf("no\n");
                  ^
0_0_14928058_27506.cpp:20:18: error: 'printf' was not declared in this scope
  else printf("\n");
                  ^