programming

Question

int *I ,j;

I =&j; 

why it is valid since j has not been defined so no memory will be allocated to j and I is having the address of J so it must saw segmentation fault

Comments

int j is not definition but is declaration.

no.... it is definition and declaration 

https://www.geeksforgeeks.org/variables-and-keywords-in-c/

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@Shaik Masthan

oh yeah, you're right.

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https://stackoverflow.com/questions/51571563/how-can-we-say-that-int-i-is-definition-as-well-as-a-declaration#51571608

Answer 1

This is valid because in the first statement j is declared as an integer variable means the memory will be allocated to j, by default the allocated memory will contain the garbage value. In the second statement the address of j will be be saved in Pointer variable I.