Struct Pointer Parameters

If you want to change a component of a struct variable, pass a pointer to the struct

typedef struct { � } Pair; // As before

void fr (Pair * p)

{(*p).a= 42;}

void main (void) {

Pair pr;

pr.a= 17;

pr.ch= �?�;

fr(&pr)

}

Abbreviation. In C, instead of writing

( * p) . a

one can write

p ->a

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