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carraysstructfunction-callsdouble-pointer

control double pointer on array of structs

I need to print a name for pointer. But it doesn't works at all. Console stops..

Maybe the problem will be on 'find_young' function. I don't know what's the problem and how to fix it. What can I do for a right code.

Below are my codes.

========

typedef struct {
    char *name;
    int age; 
} PERSON;

PERSON s[3] = { {"ACE", 25}, {"HEART" ,28}, {"CLOVER", 40} };

void find_young(PERSON **p) {
    int i;

    for (i = 0; i < 1; i++) {
        if (s[i].age > s[i+1].age) {
            p = &s[i+1];
        }
    }
};

void Ex1()
{   
    struct PERSON *p;
    p = &s[0];

    find_young(&p);
    printf("youngest man is %s.", p->name);
}
Solution

  • You are assigning between wrong types, and the compiler should warn you about it:

    p = &s[i + 1];

    Here the expression &s[i + 1] is a pointer to PERSON, but p is a pointer to a pointer to PERSON. Not quite the same thing.

    What you want is

    *p = &s[i + 1];