int main()
{
struct AutoDriveSystem* ads;
struct Car *car;
// 0. create auto drive system...
printf(">>> create auto drive system...\n");
ads = createAutoDriveSystem();
// 1. run auto drive system on Audi
printf(">>> run auto drive system on Audi...\n");
car = (struct Car*)malloc(sizeof(struct Car));
if(car == NULL) {
printf("ooops! create car failed.\n");
return -1;
}
car->gear = AudiGear;
car->fuel = AudiFuel;
car->brake = AudiBrake;
setCar(ads, car);
run(ads);
// 1. run auto drive system on Benz
printf(">>> run auto drive system on Benz...\n");
car->gear = BenzGear;
car->fuel = BenzFuel;
car->brake = BenzBrake;
setCar(ads, car);
run(ads);
// 1. run auto drive system on Toyota
printf(">>> run auto drive system on Toyota...\n");
car->gear = ToyotaGear;
car->fuel = ToyotaFuel;
car->brake = ToyotaBrake;
setCar(ads, car);
run(ads);
// 1. run auto drive system on Tesla
printf(">>> run auto drive system on Tesla...\n");
car->gear = TeslaGear;
car->fuel = TeslaFuel;
car->brake = TeslaBrake;
setCar(ads, car);
run(ads);
// 2. free resources...
free(ads);
free(car);
// 3. over test
printf(">>> test success...\n");
return 0;
}
void setVariable(char* name, void* value, lexeme* scope){
lexeme* s = scope;
while(s != NULL){
lexeme* t = car(s);
vars = car(t); vals = cdr(t);
while(vars != NULL){
if(strcmp(name, car(vars)->string) == 0){
setCar(vals, value);
return;
}
vars = cdr(vars);
vals = cdr(vars);
}
s = cdr(s);
}
return addVariable(name, value, scope);
}
Lexeme *update(Lexeme *variable, Lexeme *value, Lexeme *env) {
while(env != NULL) {
Lexeme *table = car(env);
Lexeme *vars = car(table);
Lexeme *vals = cdr(table);
while(strcmp(vars->type,NIL)) {
if(sameVariable(variable,car(vars))) {
setCar(vals,value);
return value;
}
vars = cdr(vars);
vals = cdr(vals);
}
env = cdr(env);
}
fprintf(stderr,"Variable %s is undefined\n",displayLexeme(*variable));
exit(1);
return NULL;
}
