[c language] PTA 7-50 output Fahrenheit Celsius temperature conversion table

Input 2 A positive integer lower and upper（lower≤upper≤100）, Please output one with the value range of [lower,upper]、 And increase every time 2 Fahrenheit in degrees Fahrenheit - Centigrade temperature conversion meter .

The calculation formula of temperature conversion ：C=5×(F−32)/9, among ：C It means the temperature in centigrade ,F Fahrenheit temperature .

Input format :

Enter... In one line 2 It's an integer , respectively lower and upper Value , Separate... With spaces in the middle .

Output format :

The first line outputs ："fahr celsius"

And then one Fahrenheit per line fahr（ integer ） With a centigrade temperature celsius（ occupy 6 Character width , Align right , Retain 1 Decimal place ）.

If the input range is illegal , The output "Invalid.".

sample input 1:

32 35

No blank lines at the end

sample output 1:

fahr celsius
32   0.0
34   1.1

No blank lines at the end

sample input 2:

40 30

sample output 2:

Invalid.

  Nothing special , Just need to know how many characters it takes %m.nf  Represents the occupation of a real number m position , among n Place is a decimal .

#include<stdio.h>
int main(){
	int l,r;
	scanf("%d %d",&l,&r);
	float c;
	if(l>r || l>100 ||r>100){
		printf("Invalid.");
	}else{
		printf("fahr celsius");
		while(l<=r){
			c=5*(l-32)/9.0; 
			printf("\n%d %5.1f",l,c);
			l+=2;
		}	
	
	}
	
	
	return 0;
}