We want to write a function swap that exchanges the values of two integer variables a and b . Among the following propositions, which one is the correct implementation of the swap function?

Question

We want to write a function  swap  that exchanges the values of two integer variables  a  and  b . Among the following propositions, which one is the correct implementation of the  swap  function?

Answer

void swap(int * a, int * b) {
    int tmp = *a;
    *a = *b;
    *b = tmp;
}

Answer

void swap(int a, int b) {
    int * tmp = &a;
    a = b;
    b = *tmp;
}

Answer

void swap(int a, int b) {
    int tmp = a;
    a = b;
    b = tmp;
}

Answer

void swap(int * a, int * b) {
    int * tmp = a;
    a = b;
    b = tmp;
}

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We want to write a function swap that exchanges the values of two integer vari...

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