18BCE2182 ASSESS_2 Q4, C (gcc)

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//gcc 7.4.0

#include  <stdio.h>
#include <stdlib.h>
#include <omp.h>
int main(void)
{
    int n, i, big, small, fac, j, k,l;
    int a[n];
    double start, end, start1, end1, start2, end2, start3, end3, start4, end4;
    n=5;
    big=0;
    small=0;
    fac=1;
    j=-1;
    k=1;
    l=0;
    for(i=0; i<n; i++)
    {
        a[i]=rand();
    }
    start=omp_get_wtime();
    #pragma omp parallel
    #pragma omp sections
    {
        #pragma omp section
        {
            start1=omp_get_wtime();
            for(i=0; i<n; i++)
            {
                if(big<a[i])
                {
                    big=a[i];
                }
            }
            end1=omp_get_wtime();
            printf("Biggest of n numbers: %d\n",big);
            printf("Serial Execution Time for above: %f\n", (end1-start1) );
        }
        #pragma omp section
        {
            start2=omp_get_wtime();
            for(i=0; i<n; i++)
            {
                if(small>a[i])
                {
                    small=a[i];
                }
            }
            end2=omp_get_wtime();
            printf("Smallest of n numbers: %d\n",small);
            printf("Serial Execution Time for above: %f\n", (end2-start2) );
        }
        #pragma omp section
        {
            start3=omp_get_wtime();
            for(i=1; i<=n; i++)
            {
                fac=fac*a[i];
            }
            end3=omp_get_wtime();
            printf("Factorial of n numbers: %d\n",fac);
            printf("Serial Execution Time for above: %f\n", (end3-start3) );
        }
        #pragma omp section
        {
            start4=omp_get_wtime();
            for(i=0; i<n; i++)
            {
                l=j+k;
                printf("%d,",l);
                j=k;
                k=l;
            }
            end4=omp_get_wtime();
            printf("\n");
            printf("Serial Execution Time for above: %f\n", (end4-start4) );
        }
    }
    end=omp_get_wtime();
    printf("Parallel Execution Time : %f", (end-start) );
    return 0;
}

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Compilation time: 0.12 sec, absolute running time: 0.15 sec, cpu time: 0.04 sec, memory peak: 5 Mb, absolute service time: 0,38 sec