please help me for this program

[hibaabd]

Hello , Iam begiener in linux programming with c , Ineed help for program that search for randum number in network(one server and aclients) using C language under linux.
thanks

[wje_lf]

You're a beginner in C, right? I'm thinking, rather than one of us do your work for you, that if you start by trying to write the C program yourself and asking us, "Why won't this work?" or "I'm trying to write code that does xxx; will this chunk of code do the job?", then you will learn C much better.

While you're doing that, I'd like to raise a thought.

If you're going to search for a random number, how do you recognize that a number is random?

Is this number (sequence of digits) random?

78539

Or, is this number (sequence of digits) random?

78539816339744830961566084581987572104929234984377
64552437361480769541015715522496570087063355292669
95537021628320576661773461152387645557931339852032
12027936257102567548463027638991115573723873259549
11072027439164833615321189120584466957913178004772
86412141730865087152613581662053348401815062285318
43114675165157889704372038023024070731352292884109
19731475900028326326372051166303460367379853779023
58264317591439897988273046529345483152948276279637
01861559499068739183797143818122280698454575298728
24584183406101641607715053487365988061842976755449
65235925692634804294073294188096168704616917351283
00014203178631589020694644283568944740229340929468
03671102253062383575366373963427626980699223147308
85504989028032255490216008604539953407443692827490
12967680283749999959324451248776493293320402407964
87561148638367270756606305770633361712588154827970
42752500784459688221646883302095355154294417286825
89956337260718886718278989071597058844689843798944
54644451330428067016532504819691527989773041050497

If it's random, how do you know it is?

If it's not random, and I were to add a new digit by using the same rules by which these digits were generated, what would be the next digit?

The answer is: It's not random, and the next digit would be 3. What you're looking at is the first 1000 digits of pi/4.

So how will you know that what you're looking at is a random number?

(I owe this illustration to Douglas R. Hofstadter's highly overrated but nonetheless excellent book Goedel, Escher, Bach: an Eternal Golden Braid.)

[hibaabd]

You're a beginner in C, right? I'm thinking, rather than one of us do your work for you, that if you start by trying to write the C program yourself and asking us, "Why won't this work?" or "I'm trying to write code that does xxx; will this chunk of code do the job?", then you will learn C much better.

While you're doing that, I'd like to raise a thought.

If you're going to search for a random number, how do you recognize that a number is random?

Is this number (sequence of digits) random?

78539

Or, is this number (sequence of digits) random?

78539816339744830961566084581987572104929234984377
64552437361480769541015715522496570087063355292669
95537021628320576661773461152387645557931339852032
12027936257102567548463027638991115573723873259549
11072027439164833615321189120584466957913178004772
86412141730865087152613581662053348401815062285318
43114675165157889704372038023024070731352292884109
19731475900028326326372051166303460367379853779023
58264317591439897988273046529345483152948276279637
01861559499068739183797143818122280698454575298728
24584183406101641607715053487365988061842976755449
65235925692634804294073294188096168704616917351283
00014203178631589020694644283568944740229340929468
03671102253062383575366373963427626980699223147308
85504989028032255490216008604539953407443692827490
12967680283749999959324451248776493293320402407964
87561148638367270756606305770633361712588154827970
42752500784459688221646883302095355154294417286825
89956337260718886718278989071597058844689843798944
54644451330428067016532504819691527989773041050497

If it's random, how do you know it is?

If it's not random, and I were to add a new digit by using the same rules by which these digits were generated, what would be the next digit?

The answer is: It's not random, and the next digit would be 3. What you're looking at is the first 1000 digits of pi/4.

So how will you know that what you're looking at is a random number?

(I owe this illustration to Douglas R. Hofstadter's highly overrated but nonetheless excellent book Goedel, Escher, Bach: an Eternal Golden Braid.)

Thanks for reply, I try for that program search for randum in one machine(computer),but I coud't make that one search for that number in network .and once that process find that number must make kill the other process, please try to help me again , I need that source code today .
this is aprogram that search for randum in one pc
#include <stdio.h>
#include <time.h>
int main ( )
{
/*meeee*/
struct timespec tim1,tim2;
/*end meeee*/
int r,j;long Bst,Fst, Totime,Total=0,i;float avg;
unsigned int seed=(unsigned)time(NULL);
srand(seed);
/*The rang*/
printf("Enter the range please: ");
scanf("%d",&r);
long random;
/*Generate random number*/
for (j=0; j<5; j++)
{
random = rand() % r;
printf("Random is %d:\n",random);
gettimeofday(&tim1,NULL);
printf("Time for begin search is %d \n",tim1.tv_nsec);
//Bst = tim1.tv_nsec;
i=0;
while(i !=random && i<=r)
{
i++;
}
if (i==random){
gettimeofday(&tim2,NULL);
printf("Time for Find Random is %d \n",tim2.tv_nsec);
//Fst = tim2.tv_nsec;
Totime=(int)difftime(tim2.tv_nsec,tim1.tv_nsec);
Total=Total+Totime;
printf("The TotalTime is %d \n",Total);
}
}//end for
avg = (float)Total/5;
printf("The Average Time is %f\n",avg);
return 0;
}

thanks