What is wrong in my C++ program ??

[jumper007]

This is what i try to do, but i dont know why it gives me the message:"break statement not within loop or switch" and the program doesnt compile.
P.S.: IM NOT VERY GOOD IN C++.

#include<iostream>
using namespace std;
int main(void)
{
    int a,b,i,c;
    cout<<"Give a=";
    cin>>a;
    cout<<"Give b=";
    cin>>b;
    for (i=1,500; i<=500 && c<250; i++)
    {
    c=(a*a+b*b)*i;
    if (c>250) break;
    else i+=i;
    }
    cout<<"c=(a^2+b^2)*i"<<c<<" and i="<<i<<endl;
    system("pause");
    return 0;
}    

[bluecoder]

Hi ,
you might have got the warning .
So don't worry about the warning .
its not an error .

[jumper007]

Thanks. Ill change the application from Dev C++ to Borland C++.

[Jauffre]

Hi there, Just looking at your code I can see a few basic mistakes and a few things you could change. I'll try shed some light on it.

#include<iostream>
using namespace std;
int main(void)
{
    int a,b,i,c; /*<<----Uninitialized variables. This isn't a problem yet because you set a+b in
the next 4 lines of code.*/

    cout<<"Give a=";
    cin>>a;
    cout<<"Give b=";
    cin>>b;

  /*<----- First problem Variable c is being used without being initialized so c could be any
value.*/

    for (i=1,500; i<=500 && c<250; i++) /*<---- so if C is randomly given a value above 250.
This will never happen. It will end the program. / Curious about the random number 500 */
    {
    c=(a*a+b*b)*i;
    if (c>250) break;

    else i+=i; /*<<--this line looks like it would cause the loop to change strangly if you
don't meet the if statement. ( i++ and else i+=i). first loop(1++, 1+=1, i = 3 on the next loop)(3++, 3+=3, i = 7 on the 3rd loop), so your loop is
skipping a lot of it's "loops" everytime it doesn't meet the if statement. unless this is what
you're intending to do*/
    }

    cout<<"c=(a^2+b^2)*i"<<c<<" si i="<<i<<endl; /*<<-- the i value here will change
depending on how far you got through the loop before it gets to break;*/
    system("pause");
    return 0;
}   

I expect those are the reasons your code isn't working as it should be. What is it you're trying to do?

[jumper007]

nah, i made it work, it was just a error at for (i=1,500; which should be for (i=0,500;
now it works. thanks anyway :D
P.S.: it didnt work 1st time but after i posted i compiled it again and it worked :D