hello guys i made my test version of code for greedy and i keep getting Errors expression result unused from my functions i saw pretty same problems guys asked here but answers didnt helped me i learning online (sorry for my english by the way) so i doesnt have anyone to ask for help. help me please
#include <stdio.h>
#include <cs50.h>
#include <math.h>
float change50 (float change_input);
float change25 (float change_input);
float change10 (float change_input);
float change5 (float change_input);
float change1 (float change_input);
float c50 = 0.50;
float c25 = 0.25;
float c10 = 0.10;
float c5 = 0.5;
float c1 = 0.1;
int main(void)
{
float change_input;
int coin_count = 0;
do
{
printf("how much i owe you in float:\n");
change_input = GetFloat();
}
while (change_input < 0);
do
{
{
printf("proceccing...%f\n", change_input);
coin_count++;
}
}
while (change_input > 0.49);
do
{
change25;
{
printf("proceccing...%f\n", change_input);
coin_count++;
}
}
while (change_input > 0.24);
do
{
change10;
{
printf("proceccing...%f\n", change_input);
coin_count++;
}
}
while (change_input > 0.09);
do
{
change5;
{
printf("proceccing...%f\n",change_input);
coin_count++;
}
}
while (change_input > 0.04);
do
{
change1;
{
printf("proceccing...%f\n", change_input);
coin_count++;
}
}
while (change_input > 0.00);
{
printf("%f i owe you %i coins\n", change_input, coin_count);
}
}
float change50 (float change_input)
{
return change_input -= c50;
}
float change25 (float change_input)
{
return change_input -= c25;
}
float change10 (float change_input)
{
return change_input -= c10;
}
float change5 (float change_input)
{
return change_input -= c5;
}
float change1 (float change_input)
{
return change_input -= c1;
}