Lisp for the C++ programmer: Changing an element of a list

Here is the example of changing an element of a Common Lisp List and its equivalent code in C++ typed as List comment.

 ; #include <cstdlib>  
 ; #include <cstdio>  
 ;  
 ; int main(){  
 ;    double *d = (double*) malloc (sizeof(double) * 3);  
 ;    d[0] = 1;  
 ;    d[1] = 2;  
 ;    d[2] = 4;  
 ;  
 ;    puts("Current List:");  
 ;    printf("%f %f %f\n", d[0], d[1], d[2]);  
 ;  
 ;    puts("New List:");  
 ;    d[0] = 100;  
 ;    printf("%f %f %f\n", d[0], d[1], d[2]);  
 ;    return(0);  
 ;}  
   
   
 (setq aList (list 1 2 3))  
 (print "Current List:")  
 (print aList)  
   
 (setf (elt aList 0) 100)  
 (print "New List:")  
 (print aList)  
   
   

Lisp for the C++ programmer: for loop

Here is the example of for loop. Equivalent C++ code is commented on the top the Common Lisp code as comments.

 ; for (int i = 0; i <= 10; i++){  
 ;    printf("%f\n", i);  
 ;    printf("%f\n", i * 2);  
 ; }  
   
 (loop for i from 0 to 10  
     do  
     (progn  
         (print i)  
         (print (* i 2))  
     )  
 )