I really need to get this working =(

ok im tring to make this print a randem number from 0 to 52 but i want it print out a diffrent rand everything i re run the prog.. can someone tell me how to do this.

Code:

---


#include<stdio.h>

int main()
  {
        int x[52];
        int round;

        for(round = 0; round < 10; round++);
        x[round] = (rand() % 51) + 1;

          printf(" %d\n",x[round]);
          return 0;
  }

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aaahhh you mean like this.....

Code:

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int main()
  {
        int x[52];
        int round;

        for(round = 0; round < 10; round++)
        {
        x[round] = (rand() % 51) + 1;

          printf(" %d\n",x[round]);

          return 0;
        }
  }

---

but how do i make it pring out diffrent number everything i re execute it instead of 11 all the time

Quote:

---

Code:

---

  int main()
  {
        int x[52];
        int round;

        for(round = 0; round < 10; round++)
        {
        x[round] = (rand() % 51) + 1;

          printf(" %d\n",x[round]);

          return 0;
        }
  }

---

---

Is the return in the wrong place? It seems to me that the loop will enter, run once, and then the program will end returning the value of 0(or success)?
Or have I not mastered the int main() return value yet?

Quote:

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Originally posted by VegasSte
Is the return in the wrong place? It seems to me that the loop will enter, run once, and then the program will end returning the value of 0(or success)?
Or have I not mastered the int main() return value yet?

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Yep. It's in the wrong place. Depending on your compiler options, you should get an error, something like: "Not all paths return a value." ... something to that effect.

In a function that returns a value, all 'paths' need to return something.

Code:

---

int func( int x )
{
    if( x == 10 )
    {
        return 5;
    }
    /* should give a warning here since
    there is no guarinteed return result
    for this function. ie: if x is not 10,
    then nothing gets returned */
}

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Quzah.

Before you use the rand function, you need to call the srand function.

Code:

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srand( (unsigned)time( NULL ) );

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>>x[round] = (rand() % 51) + 1;
http://www.eskimo.com/~scs/C-faq/q13.16.html

Here is what the program sould look like:

Code:

---

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

#define max_rand 52

int main()
{
  int rand_num[max_rand];
  register int c;
  srand(time(NULL));
  for(c = 0; c < max_rand; c++)
          rand_num[c] = (rand() %51) + 1;
  for(c = 0; c < max_rand; c++)
          printf("%d\n", rand_num[c]);
  return 0;
}

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You didn't seed the random generator, and you would only print out the last number entered with your printf() function:)

[edit]Code tags added by Hammer.