View Compilation Error

0_0_38345052_31441.cpp: In function 'int ss(int)':
0_0_38345052_31441.cpp:4:34: error: 'sqrt' was not declared in this scope
     for(j=2;j<(int)sqrt((double)n);j++) 
                                  ^
0_0_38345052_31441.cpp: In function 'int main()':
0_0_38345052_31441.cpp:12:30: error: 'scanf' was not declared in this scope
     while(~scanf("%d%d",&n,&m))
                              ^
0_0_38345052_31441.cpp:32:26: error: 'printf' was not declared in this scope
             printf("OK\n");
                          ^
0_0_38345052_31441.cpp:34:29: error: 'printf' was not declared in this scope
             printf("Sorry\n");
                             ^