How am I doing with this...

**Heavenstrash** · 06-25-2002

I'm very new at C programming, and whenever I take up a language, I always write a very simple fighting game. I think I completed the game for now, and was just curious on what you all thought of the code, what I've done wrong, what I could do to improve it, and any other tips you could give me. Right off the bat, I used 4 globals, which I know is a no-no, but I can't think of another way to do it without adding more variables. Yes, this is pretty long for what it is, and I would very much appreciate any feedback

thanks

Code:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>


int hislife = 20;    // Enemy's life
int yourlife = 20;   // Your life

int rand_damage;     // Random damage dealt.
int damage_self;     // Damage dealt to self if superhit


int chance() {
   int to_hit = rand() % 10 + 1;
   if (to_hit >= 6) {
      return(2);
   } else {
      return(1);
   }
}

int damage() {
   int damg = rand() % 4 + 1;
   return(damg);
}

void youswing() {

   if (chance() == 2) {
      rand_damage = damage();
      hislife -= rand_damage;
      printf("Hit enemy for %d damage!\n", rand_damage);
   } else {
      printf("Missed!\n");
   }
}

void heswing() {

   if (chance() == 1) {
      rand_damage = damage();
      yourlife -= rand_damage;
      printf("Enemy hit you for %d damage!\n", rand_damage);
   } else {
      printf("Enemy missed you!\n");
   }
}


int main() {

   char input[100];     // Data inputted
   char choice;         // Input Assignment

   srand((unsigned int)time(NULL));

   while ((choice != 'Q') && (choice != 'q')) {

      if (hislife <= 0) {
         printf("Good job. He's dead. Hope you're proud.\n");
         break;
      } else if (yourlife <= 0) {
         printf("You're dead, and you suck.\n");
         break;
      } else if ((yourlife <= 0) && (hislife <= 0)) {
         printf("You killed him, but you're dead too. Such is life..\n");
         break;
      }


      printf("His life: %d - Your life: %d\n", hislife, yourlife);
      printf("(A)ttack, (S)uperhit, (Q)uit: ");
      fgets(input, sizeof(input), stdin);
      sscanf(input, "%c", &choice);

      if ((choice == 'A') || (choice == 'a')) {

         printf("\n");

         if (chance() == 1) {
            youswing();
            heswing();
         } else {
            heswing();
            youswing();
         }

         printf("\n");

      } else if ((choice == 'S') || (choice == 's')) {

         if (chance() == 2) {
            rand_damage = damage() + 3;
            hislife -= rand_damage;
            damage_self = damage() - 2;

            if (damage_self <= 0) {
               damage_self = 1;
            }

            yourlife -= damage_self;

            printf("\nYou swung a wreckless blow for %d damage, taking %d damage to yourself\n", rand_damage, damage_self);
         } else {
            damage_self = damage() - 2;

            if (damage_self <= 0) {
               damage_self = 1;
            }

            yourlife -= damage_self;
            printf("\nYou threw a completely wreckless blow, hurting yourself for %d damage!\n", damage_self);
         }

         if (chance() == 1) {
            rand_damage = damage();
            yourlife -= rand_damage;
            printf("Enemy hit you for %d damage!\n", rand_damage);
         } else {
            printf("Enemy missed you!\n");
         }

      } else if ((choice == 'Q') || (choice == 'q')) {
         printf("Goodbye\n");
      } else {
         printf("Unknown: %c\n", choice);
      }

   }

   return(0);

}

**quzah** · 06-25-2002

Code:

int chance() {
   int to_hit = rand() % 10 + 1;
   if (to_hit >= 6) {
      return(2);
   } else {
      return(1);
   }
}

You don't really need the 'else'.

Code:

int chance( void )
{
    int to_hit = 1 + rand() % 10;
    if( to_hit > 5 )
        return 2;
    return 1;
}

Just for the record, you can even simplify this more:

Code:

int chance( void )
{
    return (rand()%10)+1 > 5 ? 2 : 1;
}

Here is one problem though:

Code:

  if (hislife <= 0) {
         printf("Good job. He's dead. Hope you're proud.\n");
         break;
      } else if (yourlife <= 0) {
         printf("You're dead, and you suck.\n");
         break;
      } else if ((yourlife <= 0) && (hislife <= 0)) {

The third choice will never happen. Put it first.

Code:

if( yourlife < 1 && hislife < 1 )
    printf("You're both dead.\n");
else
if( yourlife < 1 )
    printf("You're dead.\n");
else
if( hislife < 1 )
    printf("He's dead.\n");

I haven't read over all the rest (on the phone).

Quzah.

**Heavenstrash** · 06-25-2002

Thanks for the help - I've noticed C programmers tend to avoid >= or <= operators and tend to just use < >. Any specific reason to this? Also, the following code I just don't understand in the least:

Code:

int chance( void )
{
    return (rand()%10)+1 > 5 ? 2 : 1;
}

I see that it's comparing the rand statement and then returning either a 2 or a 1, but I've never seen the ? 2 : 1 syntax before. I suppose I could simplify the whole process by just making it go return(1 + rand()%1), in which case I wouldn't even need the function - The number following % in the rand statement is the highest number possible, -1, correct? So if I do rand() % 10, the possibilities are 0-9? Or am I off base here?

**quzah** · 06-25-2002

Thanks for the help - I've noticed C programmers tend to avoid >= or <= operators and tend to just use < >. Any specific reason to this?

Just personal preference. I just bump the value by one rather than using the = sign in <= or >= comparison. Shrug.

The way you're using rand, it just applies a modulus operator to whatever value ran normally returns. Thus, it's the remainder of whatever that number is divided by N.

rand() % 10 = 0 to 9, since the remainder of dividing anything by 10 cannot be any thing other than 0 to 9.

The ternary (or trinary) operator is an "if else" check.

if a < 5 do this, else do that

It must be used as a R-value in a statement. Consider:

a = 5 < 4 ? 0 : 1;

This means:

if( 5 < 4 ) a = 0; else a = 1;

(if this is true) ? (then this value) : (else this value)

And so:

return rand() % 10 < 5 ? 1 : 0;

Quzah.

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