存储值Turbo C ++

Question

I am currently trying to get my program to store a value so that it can display that value whenever there is an error. Here is my program :

void function()
{
    float abc[2];
    int i = 0;
    if ( i/2 != 0 ) 
    { 
      i++; 
      abc[0] = 1; 
    }
    abc[1] = abc[0];
    cout << abc[1];
}

Practically, my program keeps calling this function until I exit it, so it will keep updating my program and show me abc[1] . What I want is when the condition of the if statement is not met, abc[1] will display the previously known value of itself. How do I do it?.

Answer 1

I'm not sure exactly what result you are trying for, but you need to make abc and i static, thusly:

void function()
{
    static float abc[2];
    static int i = 0;
    if ( i/2 != 0 ) { i++; abc[0] = 1; }
    abc[1] = abc[0];
    cout<<abc[1];
}

This will allow them to retain their value between function calls. Right now that function is pretty silly, but I don't know what to recommend because I don't know what you are trying to do.

Answer 2

Not sure i fully understand what you are meaning but if you want to store the previous value for printing why not just have an abcPrevious variable? After each loop (at the end) update it with the new value.

void function()
{
    static float abcPrevious;
    static float abc[2];
    static int i = 0;
    if ( i/2 != 0 ) 
    { 
      i++; 
      abc[0] = 1; 
    }
    abcPrevious = abc[1];
    abc[1] = abc[0];
    cout << "abc[1] is: " << abc[1] << "\nabcPrevious is: " << abcPrevious << endl;
}

Hopefully this helps :D