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Why am I not able to access values that were stored in another function?

Pointers are passed by value. The function is using a copy of your pointer, which is discarded when the function ends. The caller never sees this copy.

To fix it, you could return the pointer.

int *getIntegersFromUser(int N)
    int *userAnswers = malloc(...);
    return userAnswers;

/* caller: */
int *p = getIntegersFromUser(M);

Or you could pass your pointer by reference so the function is acting on the same pointer, not a copy.

void getIntegersFromUser(int N, int
    *userAnswers = (int *) malloc(N*sizeof(int));

/* caller: */
int *p;
getIntegersFromUser(N, &p);

Categories : C

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