How do you change the values in an array c plus plus program in discussion?

Answer 1

To change the values in an array in C++ you simply assign values to the appropriate elements:

// Zero-initialise an array of 10 integers:

std::array<int, 10> a {0};

// Assign values to individual elements by index:

a[0] = 2;

a[1] = 3;

a[2] = 5;

a[3] = 7;

a[4] = 11;

a[5] = 13;

a[6] = 17;

a[7] = 19;

a[8] = 23;

a[9] = 27;

// Iterate through the indices:

for (size_t index=0; index<a.size(); ++index) {

a[index] = random_integer();

}

// Iterate elements by reference using a ranged-for loop:

for (auto& elem : a)

{

elem = random_integer();

}

Note that the suffix operator [] can also be used with C-style arrays. For example:

int a[10] {0};

a[0] = 2;

a[1] = 3;

a[2] = 5;

// etc...