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scanf acting strange...
In my program, i ask for 1 number and 3 prices.
Then i multiply each price with there respective number of articles.
Then print out the amout of items and there cost.
Here is my ouput.
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Entrez votre besoin journalier d'energie maximale en kilo watt heure (kWh).
25
Entrez le prix ($) des batteries de 4.8 volt.
1730.57
Entrez le prix ($) des convertisseurs de 5 kilo watt.
509.01
Entrez le prix ($) des panneaux photovoltaique en metre carre.
899.99
2 6 48 //The amout of item 1, 2, and 3.
1730.569946 ; 509.010010 ; 899.989990 ; //The cost of item 1, 2, and 3
//The starnge thing is that those costs arent exactly the ones i entered.
Afin d'installer un bloc d'alimentation electrique photovoltaique a panneaux pla
ts pour l'utilisation residentielle a Ottawa, ON, vous aurez besoin de:
6 Batteries (4.800000 V) = 10383.419922 $
2 Convertisseurs (5.000000 KW) = 1018.020020 $
48 Panneaux photovoltaique (m^2) = 43199.519531 $
Pour un prix total de: 54600.960938 $
//And then when i do the total cost, i have to many decimals....
Press any key to continue . . .
Here is the fonction that uses scanf, can somedy tell me how i can fix this problem or is there nothing that i can do about it?
Code:
float validate_input(int disperror)
{
float choice;
int numchar = 0;
char c;
if(disperror == 1)
{
printf("\nErreur. Entrez une nouvelle valeur.\n");
}
fflush(stdin);
scanf("%f", &choice);
do
{
scanf("%c", &c);
numchar += 1 ;
} while(c != '\n');
if(numchar != 1)
{
choice = validate_input(1);
}
if(choice <= 0)
{
choice = validate_input(1);
}
return choice;
}
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read a your decimal values uisng the double data type and read them uisng the %ld format specifier. And about the no of decimal places
Code:
printf("%.2f", num); // would get u to 2 decimal places after the point
And dont use fflush function read FAQ to understand why.
ssharish
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