View Compilation Error

0_0_17027647_26480.cpp: In function 'int main()':
0_0_17027647_26480.cpp:5:18: error: 'scanf' was not declared in this scope
     scanf("%d",&n);  
                  ^
0_0_17027647_26480.cpp:9:19: error: 'N' was not declared in this scope
         for(i=0;i<N;i++)  
                   ^
0_0_17027647_26480.cpp:17:31: error: 'printf' was not declared in this scope
             printf("$%.0f\n",s);  
                               ^
0_0_17027647_26480.cpp:19:31: error: 'printf' was not declared in this scope
             printf("$%.1f\n",s);  
                               ^
0_0_17027647_26480.cpp:21:31: error: 'printf' was not declared in this scope
             printf("$%.2f\n",s);  
                               ^