Exercise 2-12 Output Fahrenheit - Celsius conversion table (15 minutes)

Enter two positive integers lower and upper (lower≤upper≤100), make an output range of [lower, upper], and increments of 2 ° F Fahrenheit - Celsius conversion table.

Temperature conversion formula: C = 5 × (F-32) / 9, wherein: C represents temperature in degrees Celsius, F represents Fahrenheit.

Input formats:

2 on a single line an integer, represent the values ​​of the lower and upper, separated by spaces.

Output formats:

The first line of output: "fahr celsius"

Then each row outputs a Fahr Fahrenheit (integer) and a Celsius Celsius (6 characters occupying width, right justified, Reserved 1 decimal).

If the range entered is not valid, the output "Invalid.".

Sample Input 1:

32 35

Output Sample 1:

driving celsius
32 0.0
34 1.1

Sample Input 2:

40 30

Output Sample 2:

Invalid.

#include<stdio.h>
int main()
{
	int a, b, f;
	float c;
	scanf("%d %d", &a, &b);
	if (a>b) {
		printf("Invalid.\n");
		}
	else
	{
		printf("fahr celsius\n");
		for (f = a; f <= b; f += 2) {
			c = 5 * (f * 1.0 - 32) / 9;
			printf("%d%6.1f\n", f, c);
		}
	}
	return 0;
}