View Compilation Error

0_0_14115982_25960.cpp: In function 'int main()':
0_0_14115982_25960.cpp:6:29: error: 'scanf' was not declared in this scope
     while(scanf("%d%d",&n,&m)!=EOF)
                             ^
0_0_14115982_25960.cpp:6:32: error: 'EOF' was not declared in this scope
     while(scanf("%d%d",&n,&m)!=EOF)
                                ^
0_0_14115982_25960.cpp:8:41: error: 'memset' was not declared in this scope
                     memset(a,0,sizeof(a));
                                         ^
0_0_14115982_25960.cpp:21:71: error: 'printf' was not declared in this scope
                                                 if(flag){printf("%d",i);m--;flag=0;}
                                                                       ^
0_0_14115982_25960.cpp:22:69: error: 'printf' was not declared in this scope
                                                 else {printf(" %d",i);m--;}
                                                                     ^
0_0_14115982_25960.cpp:23:68: error: 'printf' was not declared in this scope
                                               }if(m==0){printf("\n");break;}
                                                                    ^