Reference Parameter Update

#include <iostream>

void update(int32_t &a, int32_t &b) {
   a= a +b;
}

int main() {
    int32_t x, delta;
    std::cin >> x >> delta;

    // update(x, delta);
    int32_t &refx = x;
    int32_t &refdelta = delta;
    refx = refx + refdelta;

    std::cout << refx;   // Print updated value

    return 0;
}

Solving Approach