like this code

  fp1=fopen("Fruit.txt","r");
  if(fp1==NULL)
  {
       printf("ERROR in opening file\n");
       return 1;
  }
  else
  {
    for(i=0;i<lines;i++)//reads Fruits.txt database
    {
    fgets(product,sizeof(product),fp1);
    id[i]=atoi(strtok(product,","));
    strcpy(name[i],strtok(NULL,","));
    price[i]=atof(strtok(NULL,","));
    stock[i]=atoi(strtok(NULL,"\n"));
    }
  }
  fclose(fp1);

These symbols sound too similar to differentiate their function,can anyone helps me by any method, or use names of shape according to this site http://www.breezetree.com/article-excel-flowchart-shapes.htm