C :

#include <stdio.h>
int ctof(int c);

int main(void)
{
	int i,start,end;
    scanf("%d%d",&start,&end);
    for(i=start;i<=end;i+=10)
	{
    	printf("%dC=%dF\n",i,ctof(i));
    }
	return 0;
}

int ctof(int c)
{
	return 32+c*9/5;
}

C++ :

#include<iostream>
using namespace std;
int main()
{
	int a,b,f;
	cin>>a>>b;
	for (int i=a; i<=b; i+=10)
	{
		f=32+i*9.0/5;
		cout<<i<<"C="<<f<<"F\n";
	}
	return 0;
}