Using std::vector
suggest changeA std::vector
can be useful for returning a dynamic number of variables of the same type. The following example uses int
as data type, but a std::vector
can hold any type that is trivially copyable:
#include <vector>
#include <iostream>
// the following function returns all integers between and including 'a' and 'b' in a vector
// (the function can return up to std::vector::max_size elements with the vector, given that
// the system's main memory can hold that many items)
std::vector<int> fillVectorFrom(int a, int b) {
std::vector<int> temp;
for (int i = a; i <= b; i++) {
temp.push_back(i);
}
return temp;
}
int main() {
// assigns the filled vector created inside the function to the new vector 'v'
std::vector<int> v = fillVectorFrom(1, 10);
// prints "1 2 3 4 5 6 7 8 9 10 "
for (int i = 0; i < v.size(); i++) {
std::cout << v[i] << " ";
}
std::cout << std::endl;
return 0;
}
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