Hi everyone, I was solving a problem of finding the biggest angle in the triangle . I first examined if there is a triangle with entered numbers and then calculated angles, found maximum and express it in degrees,minutes and seconds. But it says in line 22 that there is a mistake.(It's written that function is overloaded).In lines 23,24,25 it shows also mistakes.

Code:
```#include<iostream>
#include<cmath>
using namespace std;
int main(){
double a,b,c;
cout<<"Enter a,b,c :";
cin>>a>>b>>c;
if(a>0 && b>0 && c>0 && ((a+b<c) || (c+b<a) || (a+c<b))){
double gama=acos((a*a+b*b-c*c)/2*a*b);
double alfa=acos((b*b+c*c-a*a)/2*b*c);
double beta=acos((a*a+c*c-b*b)/2*a*c);
double pi=4*atan(double(1));
gama*=(180/pi);
alfa*=(180/pi);
beta*=(180/pi);
if((alfa>beta)&&(alfa>gama))
double max=alfa;
else if((beta>alfa)&&(beta>gama))
double max=beta;
else if((gama>beta)&&(gama>alfa))
double max=gama;
max*=3600;
int degrees=int(max/3600);
int minutes=int(((max)-3600*(degrees))/60);
int seconds=int(max-3600*seconds-60*minutes);

cout<<"The biggest angle : "<<degrees<<" degrees"<<", "<<minutes<<"minutes"<<"i"<<seconds<<"seconds"<<endl;
}
else cout<<"It doesn't exist";
return 0;
}```

2. Your code has multiple definitions of max. Change this
Code:
```    if((alfa>beta)&&(alfa>gama))
double max=alfa;
else if((beta>alfa)&&(beta>gama))
double max=beta;
else if((gama>beta)&&(gama>alfa))
double max=gama;```
to
Code:
```    double max;
if((alfa>beta)&&(alfa>gama))
max=alfa;
else if((beta>alfa)&&(beta>gama))
max=beta;
else if((gama>beta)&&(gama>alfa))
max=gama;```
It also pays to learn the practice of indenting code - it makes coding problems easier to find.

If that doesn't fix your problem, rename "max" to something else. Although it is non-standard, the standard headers shipped with some compilers (notably some versions of Microsoft compilers) do declare a function named max(), so will give problems with your code. The standard specifies that the <algorithm> header supplies a templated std::max() function, and some other standard headers might #include that header (another quaint quirk of some implementations of the standard libraries).

3. Originally Posted by grumpy
...If that doesn't fix your problem, rename "max" to something else. Although it is non-standard, the standard headers shipped with some compilers (notably some versions of Microsoft compilers) do declare a function named max(), so will give problems with your code. The standard specifies that the <algorithm> header supplies a templated std::max() function, and some other standard headers might #include that header (another quaint quirk of some implementations of the standard libraries).
Which is why I do not advocate using using namespace std.
Hmm. I might just write an article about that one.

4. Thank you both !