View Compilation Error

0_0_37658608_2809.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_37658608_2809.cpp: In function 'int main()':
0_0_37658608_2809.cpp:6:91: error: 'cin' was not declared in this scope
 for(int i=2;i*i<=n;i++){ if(n%i==0){ return 0; } } return 1; } int main(){ int i,x; while(cin>>x){
                                                                                           ^
0_0_37658608_2809.cpp:11:9: error: 'swap' was not declared in this scope
 swap(i,w);
         ^
0_0_37658608_2809.cpp:13:21: error: 'printf' was not declared in this scope
 printf("%d %d\n",i,w);
                     ^