Comparing input as integer or not

[saza]

heyya!

again i have a problem,

im trying to compare if either the int input "choice" is really an integer or not.

enter an integer input (int choice)
if input is an integer
do this
else
do that

how doi construct the if argument?

thanks!

[AdrianH]

heyya!

again i have a problem,

im trying to compare if either the int input "choice" is really an integer or not.

enter an integer input (int choice)
if input is an integer
do this
else
do that

how doi construct the if argument?

thanks!

Show me how you are going to read in the input.


Adrian

[saza]

that's the thing, i dont know how it works.

int choice
 
scanf("%i", &choice);
 
if (/* choice input is not an integer...... */) <-- what statement should i write in?

Thanks!

[AdrianH]

that's the thing, i dont know how it works.

int choice

scanf("%i", &choice);

if (chice input is not an integer...... ) <-- what statement should i write in?

Thanks!

Uh, I think you mean "%d" (see http://www.cplusplus.com/reference/c...dio/scanf.html for more details on scanf format specifers and return values.

Anyway, if when reading in the input stream it cannot convert the value to an integer, scanf will return 0 as a result (it actully returns the number of successful scanned items).

Hope this helps.


Adrian

[Savage]

Well,you can test it on this way:

    int choice;
    textbackground(0);
    clrscr();
    scanf("%d",&choice);
    if(choice%1==0)/*If choice is declared as integer this condition is always true.*/
    {
        printf("\n\n\t Number is of integer type"):
        getch();
    }else{
        printf("\n\n\t Number is not of int type"):
    }
}