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void func(int* param){};
func(&123); //error: '&' on constant
funct(&int(123)) //error
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The syntax of declaring a pointer is to place a * in front of the name. A pointer is associated with a type (such as int and double ) too. Naming Convention of Pointers: Include a " p " or " ptr " as prefix or suffix, e.g., iPtr , numberPtr , pNumber , pStudent .
The Stack Pointer (SP) register is used to indicate the location of the last item put onto the stack. When you PUT something ONTO the stack (PUSH onto the stack), the SP is decremented before the item is placed on the stack.
Pointer arithmetic and arrays. Add an integer to a pointer or subtract an integer from a pointer. The effect of p+n where p is a pointer and n is an integer is to compute the address equal to p plus n times the size of whatever p points to (this is why int * pointers and char * pointers aren't the same).
That's not how pointers work.
You must first allocate memory for your 123, like this:
int x = 123;
func(&x);
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