Question

Need help adjusting this code in C. I'm not sure this one part of the code is correct, it needs to generate n random addresses between 0 and (2^32)-1. So I set it to "address = rand() % 232;" but I'm not sure if that is correct. Can you please fix thanks.

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

int main()
{

unsigned int address;
unsigned int pg_num;
unsigned int offset;
unsigned int i;
unsigned int n = 1000000;
double time_taken;

srand((unsigned)time(NULL));
clock_t begin = clock();

for (i = 0; i < n; i++)
{
    address = rand() % 232;
    pg_num = address / 4096;
    offset = address % 4096;
}

clock_t end = clock();

time_taken = (double)(end - begin) / CLOCKS_PER_SEC;
printf("Total CPU time: %f\n", time_taken);
return 0;

}

Answer 1

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

int main()
{

unsigned int address;
unsigned int pg_num;
unsigned int offset;
unsigned int i;
unsigned int n = 1000000;
double time_taken;

srand((unsigned)time(NULL));
clock_t begin = clock();

for (i = 0; i < n; i++)
{
// it is 2^32-1 not 232
address = rand() % (int)(pow(2,32)-1);
pg_num = address / 4096;
offset = address % 4096;
}

clock_t end = clock();

time_taken = (double)(end - begin) / CLOCKS_PER_SEC;
printf("Total CPU time: %f\n", time_taken);
return 0;

}

1 2 3 4 #include <stdio.h> #include <stdlib.h> #include <time.h> #include <math.h> 6 7 - int main() { unsigned int address; 10 unsigned int pg_num; unsigned int offset; unsigned int i; 13 unsigned int n = 1000000; 14 double time_taken; 15 16 srand((unsigned) time(NULL)); 17 clock_t begin = clock(); 19 for 20 - { (i = 0; i < n; i++) // it is 2432-1 not 232 address = rand() % (int) (pow(2,32)-1); Pg_num = address / 4096; offset = address % 4096; clock_t end = clock(); time taken = (double) (end - begin) / CLOCKS_PER_SEC) printf("Total CPU time: %\n", time_taken) 31 return 0; 33 } Total CPU time: 0.087227 ... Program finished with exit code 0 Press ENTER to exit console.

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