# Temperature Converter Challenge Solution

Credit: Denis Meyer
```/*
*
* Kernighan & Ritchie - The C Programming Language
* Exercise 1.4
* Write a Program to print the corresponding Celsius to Fahrenheit table
* Extension: Scanf
*
* Author: Denis Meyer, www.calltopower.de
*
*/
#include <stdio.h>

#define LOWER_LIMIT 0
#define HIGHER_LIMIT 50000

int main(void) {
double fahr, cel;
int limit_low = -1;
int limit_high = -1;
int step = -1;
int max_step_size = 0;

/* Read in lower, higher limit and step */
while(limit_low < (int) LOWER_LIMIT) {
printf("Please give in a lower limit, limit >= %d: ", (int) LOWER_LIMIT);
scanf("%d", &limit_low);
}
while((limit_high <= limit_low) || (limit_high > (int) HIGHER_LIMIT)) {
printf("Please give in a higher limit, %d < limit <= %d: ", limit_low, (int) HIGHER_LIMIT);
scanf("%d", &limit_high);
}
max_step_size = limit_high - limit_low;
while((step <= 0) || (step > max_step_size)) {
printf("Please give in a step, 0 < step >= %d: ", max_step_size);
scanf("%d", &step);
}

/* Initialise Celsius-Variable */
cel = limit_low;

/* Print the Table */
printf("\nCelsius\t\tFahrenheit");
printf("\n-------\t\t----------\n");
while(cel <= limit_high) {
fahr = (9.0 * cel) / 5.0 + 32.0;
printf("%f\t%f\n", cel, fahr);
cel += step;
}
printf("\n");

return 0;
}
```