I read that if a variable/pointer is declared outside a function it will be assigned a value of zero/NULL by default. I worte a code to test the same and found it is very much correct:
result i get is :Code:/* Values of un initialized variables and pointers when declared inside or outside a function */ #include<stdio.h> int j; int *ptr; int main(void) { int k; int *ptr2; printf("j is declared outside main %d\n", j); printf("ptr is declared outside main %d\n", ptr); printf("k is declared inside main %d\n", k); printf("ptr2 is declared inside main %d\n", ptr2); return 0; }
My question is what is the logic behind this behaviour? why won't variables that are declared inside a function also initialized to zero/NULL automatically?Code:$ ./prog1 j is declared outside main 0 ptr is declared outside main 0 k is declared inside main -1208533004 ptr2 is declared inside main -1208408144
Originally Posted by matsp
