Re: What compiler is doing when we pass unnecessary parameters in scanf

[shiva kumar <shiva@serc.iisc.ernet.in>]

behavior of this is undefined just do man scanf

RAM_LOCK wrote:
> 
> Hi,
> In the second scenario what value is it printing when i have given extra
> parameter in scanf?
> Does it vary from compiler to compiler?
> 
> Scenario : I
> -------------
> root@kaushik_Fedora11 ~/C/LET_US_C/ch-1> cat simple-interest.c
> #include <stdio.h>
> 
> void main ()
> {
>         int p;
>         float i=0;
>         printf ("enter the principal amount\n");
>         scanf ("%d",&p);
>         i = (p*5*5)/100;
>         printf ("Interterest is : %f\n",i);
> }
> root@kaushik_Fedora11 ~/C/LET_US_C/ch-1> ./a.out
> enter the principal amount
> 100
> Interterest is : 25.000000
> 
> 
> Scenario : II
> -------------
>> cat simple-interest.c
> #include <stdio.h>
> 
> void main ()
> {
>         int p;
>         float i=0;
>         printf ("enter the principal amount\n");
>         scanf ("p:%d",&p);
>         i = (p*5*5)/100;
>         printf ("Interterest is : %f\n",i);
> }
> root@kaushik_Fedora11 ~/C/LET_US_C/ch-1> ./a.out
> enter the principal amount
> 100
> Interterest is : -9321198.000000
> 
> 

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