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


int main(int argc, char *argv[])
{
 int i,j,y,erg;

 if(argc < 4)
  {
   fprintf(stderr,"Benötige mindestens 4 Argumente!\n");
   fprintf(stderr,"Aufruf: a.out <zahl> <op> <zahl>\n");
   exit(1);
  }

 erg = atoi(argv[1]); /*die 1. Zahl in einem Integer umwandeln*/

 for(i=1; i<argc-1; i+=2)
  {
   for(j=i+1;j<i+2;j++)
    {
     y = atoi(argv[i+2]);

     if(strcmp(argv[j],"+") ==0)
      { 
       erg+=y; 
      }
     else if(strcmp(argv[j],"-") ==0)
      {
       erg-=y;
      }
     else if(strcmp(argv[j],"*") ==0)
      {
       erg*=y;
      }
     else if(strcmp(argv[j],"/") ==0)
      {
       erg/=y;
      }
     else
      {
       fprintf(stderr,"Ungültiger Operand : %s ???\n",argv[j]);
       exit(1);
      }
    }/*for*/
  }/*for*/
 printf("%d",erg);
 return 0;
}