troubleshooting Question

empty string

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pigyc asked on
C
6 Comments1 Solution202 ViewsLast Modified:
pigy is not clear about the concept of null pointer and emtpy string.
I saw codes using something like

if(str !=NULL)  doSomething...
or

if(str[0] !='\0')

or
if(!str)

or combine both using
if(str!=NULL && str[0] !='\0')

could any one clear this concepts and let me know when to use what? should i always use
if(str!=NULL and str[0] !='\0') to be safer??

ASKER CERTIFIED SOLUTION
rajeev_devin

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