1.c

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

void main() {
    int a[10],b[10],c[10],d[10],i;
    for(i=0;i<10;i++)
        a[i] = b[i] = i*10;
    #pragma omp parallel num_threads(4)
    {
        int tid = omp_get_thread_num();
        int x;
        #pragma omp sections
        {
        	#pragma omp section
        	{
        	    printf("%d \n",omp_get_thread_num());
        	    for(x=0;x<10;x++) {
    	            c[x] = a[x] + b[x];
    	        }
        	}
        	#pragma omp section
        	{
        	    printf("%d \n",omp_get_thread_num());
        	    for(x=0;x<10;x++) {
    	            d[x] = a[x] * b[x];
    	        }
        	}
        }
    }
    for(i=0;i<10;i++)
        printf("%d %d\n",c[i],d[i]);
}