Online lab help please.

[td0g03]

Hello, I been working at this for about 30 minutes now and can't seem to get it. This part is called One-Way selection. Here is the question...

Given the integer variables x , y , and z , write a fragment of code that assigns the smallest of x , y , and z to another integer variable min .

Assume that all the variables have already been declared and that x , y , and z have been assigned values).

Here is the code the provide

1 int main() {
2    int x, y, z, min;

Your Code here...

5 
6    return 0;
7 }

Now my question is how wold you find which one has the lowest amount?

[sicarie]

Hello, I been working at this for about 30 minutes now and can't seem to get it. This part is called One-Way selection. Here is the question...



Here is the code the provide

1 int main() {
2    int x, y, z, min;

Your Code here...

5 
6    return 0;
7 }

Now my question is how wold you find which one has the lowest amount?

How would you find the lowest amount? Without a computer program?

[td0g03]

How would you find the lowest amount? Without a computer program?

I would first look at all the numbers and see which one is the lowest. Or I would do if A<B and A<C then A is the lowest. If not then etc etc.

[sicarie]

I would first look at all the numbers and see which one is the lowest. Or I would do if A<B and A<C then A is the lowest. If not then etc etc.

So you would compare one to the other, store the smaller of the two, compare it to the next, and keep doing that until you have completed the program.

You have your algorithm right there, where are you stuck? On the comparisons?

[td0g03]

So you would compare one to the other, store the smaller of the two, compare it to the next, and keep doing that until you have completed the program.

You have your algorithm right there, where are you stuck? On the comparisons?

Well, when I try this

if (x<y && x<z)
    min= x;
else
if (y<x && y<z)
    min= y;
else
if (z<x && z<y)
    min= z;

I get the error

Suggestion: You are not assigning anything to min.

[sicarie]

Well, when I try this

if (x<y && x<z)
    min= x;
else
if (y<x && y<z)
    min= y;
else
if (z<x && z<y)
    min= z;

I get the error

I would try removing the else statements, see what that does.

[td0g03]

I would try removing the else statements, see what that does.

No luck darn.

[sicarie]

No luck darn.

If that didn't work, I would try each one by itself.

[nmadct]

It looks fine, with the else statements. The problem is that the compiler can't tell that in all cases one of the three must be true, so it thinks that in some cases, min might be unassigned. Make it shut up by declaring min=0 at the top of your program. That way, it's satisfied because min will always be defined.