programming

Question

is *ptr=&a is true in C

i found this in

can anyone explain what does *ptr = &i; in the above picture

Comments

Pointer points to the address of an object.

int *ptr = &a; &a gives the address where a is stored and that address is stored by ptr.

While using pointer , * is called de-referencing operator . *ptr will get you the data stored at address in ptr

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okay i understand what you say..

but i have a doubt is int *ptr=&a; and ptr=&a will does the same job i means these two are same or not ???

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1st and 2nd line are different things. I think you are getting confused in it.

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int *ptr =&i;   // we are creating the pointer and initiailizing it to point to address of i. here *ptr means than ptr is pointer variable. it can also be written as

int *ptr;

ptr =&i;       //pointer points to location where value of i is stored

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*ptr =&i;       // we are storing the address of i as a value in the address location pointed by pointer. here *ptr is denoting the value present in the location where pointer ptr is pointing.

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*ptr = i;        // value contained in the address location pointed by pointer becomes i.

 

 

 

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int *ptr = &a and ptr = &a will do the same job.

*ptr= &a will not do the same job.

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thank you...!