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

#define MAX 100

getVec(FILE * fin,int v[],int n)
{  int i;
   i = 0;
   while(i<n)
   {  fscanf(fin,"%d",&(v[i]));
      i = i+1;
   }
}

printVec(int v[],int n)
{  int i;
   i = 0;
   while(i<n)
   {  printf("%2d ",v[i]);
      i = i+1;
   }
   printf("\n");
}

int scalar(int v0[],int v1[],int n)
{  int s;
   int i;
   s = 0;
   i = 0;
   while(i<n)
   {  s = s+v0[i]*v1[i];
      i = i+1;
   }
   return s;
}

main(int argc,char ** argv)
{  FILE * fin;
   int v0[MAX],v1[MAX];
   int n;
   if(argc!=2)
   {  printf("scalar: wrong number of arguments\n");
      exit(0);
   }
   if((fin=fopen(argv[1],"r"))==NULL)
   {  printf("scalar: can't open %s\n",argv[1]);
      exit(0);
   }
   fscanf(fin,"%d",&n);
   if(n>=MAX)
   {  printf("scalar: %d vector bigger than %d\n",n,MAX);
      fclose(fin);
      exit(0);
   }
   getVec(fin,v0,n);
   printVec(v0,n);
   getVec(fin,v1,n);
   printVec(v1,n);
   fclose(fin);
   printf("scalar product: %d\n",scalar(v0,v1,n));
}