c-first-steps

 /*    Ejercicio 4 - Guia 2, Algoritmos y Programacion I - FIUBA    */
 
 
 #include <stdio.h>
 #include <stdlib.h>
 
 #define MAX_INP_LEN 10
 
 typedef enum {
     FAHRENHEIT,
     CELSIUS
 } escala_t;
 
 typedef float dato_t;    //    this statement is not practical at all
                         //    but was part of the intro to typedef
 
 dato_t ftoc(dato_t fahrenheit) {
     return (((fahrenheit - 32)*5)/9);
 }
 
 dato_t ctof(dato_t celsius) {
     return (((celsius * 9)/5) + 32);
 }
 
 void title(int i)
 {
     printf(
         "---------------------------------------\n"
         "---------------------------------------\n"
         "--- %s TO %s CONVERTER ---\n"
         "---------------------------------------\n"
         "---      to exit press Ctrl+D      ----\n"
         "---------------------------------------\n"
         "---------------------------------------\n",
         i ? "CELSIUS" : "FAHRENHEIT",
         i ? "FAHRENHEIT" : "CELSIUS"
     );
 }
 
 void cursor() {
     printf(">> ");
 }
 
 
 int main(void)
 {
     char buffer[MAX_INP_LEN];
     escala_t c;
     dato_t i, res;
     printf("0 - FAHRENHEIT TO CELSIUS\n");
     printf("1 - CELSIUS TO FAHRENHEIT\n");
     cursor();
     c = getchar() - '0';
     if(c == FAHRENHEIT) {
         title(FAHRENHEIT);
         while(fgets(buffer, MAX_INP_LEN, stdin) != NULL) {
             i = atoi(buffer);
             res = ftoc(i);
             printf("%.0f°F = %.2f°C\n", i, res);
             cursor();
         }
     } else if(c == CELSIUS) {
         title(CELSIUS);
         while(fgets(buffer, MAX_INP_LEN, stdin) != NULL) {
             i = atoi(buffer);
             res = ctof(i);
             printf("%.0f°C = %.2f°F\n", i, res);
             cursor();
         }
     }
     printf("\n");
     return 0;
 }