mystery2

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< mystery1

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Main Page → Exercises → C++ → Solve an Exercise

Language/Type: C++ arrays

Consider the following function:

void mystery2(int a[], int length) {
    for (int i = 1; i < length - 1; i++) {
        a[i] = a[i - 1] - a[i] + a[i + 1];
    }
}

Indicate in the right-hand column what values would be stored in the array after the function arrayMystery executes if each integer array below is passed as a parameter to it.

`int a1[] = {42, 42}; mystery2(a1, 2);`
`int a2[] = {6, 2, 4}; mystery2(a2, 3);`
`int a3[] = {7, 7, 3, 8, 2}; mystery2(a3, 5);`
`int a4[] = {4, 2, 3, 1, 2, 5}; mystery2(a4, 6);`
`int a5[] = {6, 0, -1, 3, 5, 0, -3}; mystery2(a5, 7);`

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