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#include <tice.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define EnterKey 5
#define maxline 22
double lbsToG(double lbs);
double gToLbs(double gram);
double ozToG(double oz);
double gToOz(double gram);
double ozToLbs(double oz);
double lbsToOz(double lbs);
double getInput(void);
void output(int operation);
int main(void)
{
while(true) {
os_ClrHome();
printf("MassCalc\nSelect:\n1. Pounds to Grams\n2. Grams to Pounds\n3. Ounces to Grams\n4. Grams to Ounces\n5. Pounds to Ounces\n6. Ounces to Pounds\n7. Exit");
uint16_t key = os_GetKey();
if(key == 149)
break;
output(key);
/* Waits for a key press */
while (!os_GetCSC());
}
return 0;
}
void output(int operation)
{
os_ClrHome();
double value = 0.0;
switch(operation) {
case 143:
printf("Pounds to Grams\n");
value = lbsToG(getInput());
break;
case 144:
printf("Grams to Pounds\n");
value = gToLbs(getInput());
break;
case 145:
printf("Ounces to Grams\n");
value = ozToG(getInput());
break;
case 146:
printf("Grams to Ounces\n");
value = gToOz(getInput());
break;
case 147:
printf("Pounds to Ounces\n");
value = lbsToOz(getInput());
break;
case 148:
printf("Ounces to Pounds\n");
value = ozToLbs(getInput());
break;
default: printf("Invalid");
}
printf("\nOutput: %f", value);
}
double getInput(void)
{
uint8_t key, i = 0;
char number[maxline];
char *eptr;
double value = 0.0;
printf("Input: ");
while((key = os_GetKey()) != EnterKey) {
if(key == 141 || key == 140)
key--;
number[i] = (key - 142) + '0';
printf("%c", number[i++]);
}
number[i] = '\0';
value = strtod(number, &eptr);
return value;
}
double lbsToG(double lbs)
{
double gram = 0;
gram = lbs * 453.59237;
return gram;
}
double gToLbs(double gram)
{
double lbs = 0;
lbs = gram / 453.59237;
return lbs;
}
double ozToG(double oz)
{
double gram = 0;
gram = lbsToG(ozToLbs(oz));
return gram;
}
double gToOz(double gram)
{
double oz = 0;
oz = lbsToOz(gToLbs(gram));
return oz;
}
double lbsToOz(double lbs)
{
double oz = 0;
oz = lbs * 16;
return oz;
}
double ozToLbs(double oz)
{
double lbs = 0;
lbs = oz / 16;
return lbs;
}
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