int *ptr,a=10;
ptr=&a;
printf("%d %d",*ptr,a); // 10 10
printf("\n\n%d %d",*ptr,a++); //11 10
printf("\n\n%d %d",a++, *ptr); //11 12
printf("\n\n%d %d",a, *ptr); //12 12
My question is in the second printf. Why *ptr and a is different?
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This is not a dublicate of the linked questions. One of them is about accessing the same variable twice, without pointers, and the other one is a C++ question. – 12431234123412341234123 Sep 21 '20 at 14:08
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Using a variable twice in the same statement, that has a increment or decrement, even when the other access it dereferencing a pointer, is UB. – 12431234123412341234123 Sep 21 '20 at 14:10