c - WHY the following program is not giving error? - 


#include<stdio.h> void main () {      int a=4;      const int *p=&a;       *p--;       }

in above line means can not change value via p, in decrement statement should give error not giving error. can explain why??

*p-- decrements p not contents of p.

if (*p)-- compilation error

error: decrement of read-only location ‘*p’

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