2-6

  #include<stdio.h>
    int main(void)
    {
     int fahr,lower,upper;
     double celsius;

      printf("Enter lower:");        
      scanf("%d",&lower);            
      printf("Enter upper:");       
      scanf("%d",&upper);             
      printf("fahr celsius\n");       


       for(fahr=lower;fahr<=upper;fahr++){
           celsius=(5.0/9.0)*(fahr-32);         
           printf("%d%6.lf/n",fahr,celsius);   
        }
       
        return 0;
}