Write a single program that call three functions in c

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Reference no: EM132213981

Write a single program that call three functions in C. Have the three functions each create/initialize an array but have one that declares and initialize a large array statically (from data segment), one that declares and initialize the same size array on the stack, and one that creates and initialize the same size array from the heap.

Call each of the subprograms a large number of times (at least 1,000) and output the average time required by each.

Explain your results. For example, what are the trade-offs, in time and space, when the allocation of an arrays occurs in the runtime stack rather than the heap or data/static segment?

By large size we mean > 10000000 Declaring and initialize the arrays via for loop in each function for int i=0; i< SIZE; i++) array[i]=i; For determining the time each takes could do something like the following:

#include <time.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/resource.h>
#include <sys/time.h>
struct rusage ruse;
#define CPU_TIME (getrusage(RUSAGE_SELF,&ruse), ruse.ru_utime.tv_sec + \
ruse.ru_stime.tv_sec + 1e-6 * \
(ruse.ru_utime.tv_usec + ruse.ru_stime.tv_usec))
int main(void) {
time_t start, end;
double first, second;
// Save user and CPU start time
time(&start);
first = CPU_TIME;
// Perform operations
/* . . . */
// Save end time
time(&end);
second = CPU_TIME;
printf("cpu : %.2f secs\n", second - first);
printf("user : %d secs\n", (int)(end - start));
}

Reference no: EM132213981

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