Question

Hi, for the below output the run is:

x : 1 | y : 1
x : 0 | y : 2
x : 0 | y : 0
x : 2 | y : 1
x : 1 | y : 8

Also compare your output output should not be wrong, run on "Xcode" to see the about output.

Thanks

int x = 1, y = -1;

void swapplus1(int n1, int n2) {
         int temp = n1 + 1;
         n1 = n2 - 1;
         n2 = temp;
         x = x + n1;
}
void swapplus2(int& n1, int& n2) {
         int temp = n1 + 1;
         n1 = n2 - 1;
        n2 = temp;
}
void swapplus3(const int& n1, const int& n2) {
         int n1val, n2val, temp = n1 + 1;
         n1val = n2 - 1;
        n2val = temp;
        y -= n2;
}
void swapplus4(int* p1, int* p2) {
         int temp = *p1 + 1;
         *p1 = *p2 + 1;
         *p2 = temp;
         x = *p1 + y;
}
void swapplus5(int* &p1, int* &p2) {
        int* temp = p1 + 1;
        p1 = p2 - 1;
        p2 = temp;
}
void print(const int& x, const int& y) {
         cout << "\n x: " << x << " |y: " << y;
}

int main() {
       int arr[]{ 2, 4, 6, 8, 10, 12, 14 };
       y = arr[3] / size(arr);
      
       swapplus1(x,y);         print(x, y);
       swapplus2(x,y);         print(x, y);
       swapplus3(x,y);         print(x, y);
       swapplus4(&x,&y);    print(x, y);
       int *px = &x, *py = &y;
       (*px)--;
       (*py) -= -7;
       swapplus5(px,py);         print(x, y);
       return 0;
}

      

Answer 1

Basically after executing the code the output will produce

x: 0 |y: 0

x: - 1|y: 1

x: - 1|y: 0

x: 1|y: 0

x: 0|y:7

Compare the given output along with question is fully mismatch. For first line output bot x and y having 0 but guven 1

Fir second line output x is - 1 and y is 1 but given 0 and 2.

Similarly other line output is mismatch