C :

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int ctof(int c)
{
	int f;
	f=32+c*9/5;
	return f;
} 
int main(int argc, char *argv[]) {
	int c,f;
	for(c=-100;c<=150;c+=5)
	{
		f=ctof(c);
		printf("c=%d->f=%d\n",c,f);
	}
	return 0;
}

C++ :

#include<iostream>
using namespace std;
int ctof(int c)
{
	return 32+c*9/5;
}
int main()
{
	for (int c=-100; c<=150; c+=5)
		cout<<"c="<<c<<"->f="<<ctof(c)<<endl;
	return 0;
}