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C++ : Program to find maximum using function

  


// using global variable

#include<iostream>
using namespace std;

int a=0,b=0,c=0,x,y,z,m;
void input_num()
    {
      cout<<"Enter Value of a ";
      cin>>a;
      cout<<"Enter Value of b ";
      cin>>b;
      cout<<"Enter Value of c ";
      cin>>c;
    }

int maximum(int a,int b,int c)
{
    if(a>b)
        if(a>c)
            return a;
        else
            return c;
    else
        if(b>c)
            return b;
        else
            return c;
}

int main()
{
  input_num();
  m=maximum(a,b,c);
  cout<<m<<endl;
}



// using pass by reference

 #include<iostream>
using namespace std;

int input_num(int &a,int &b,int &c)
    {
      // int a,b,c;
      cout<<"Enter Value of a ";
      cin>>a;
      cout<<"Enter Value of b ";
      cin>>b;
      cout<<"Enter Value of c ";
      cin>>c;
      // return a,b,c;
    }

int maximum(int a,int b,int c)
{
  if(a>b)
        if(a>c)
            return a;
        else
            return c;
    else
        if(b>c)
            return b;
        else
            return c;
}

int main()
{
 
  int a=0,b=0,c=0,m;
  input_num(a,b,c);
  m=maximum(a,b,c);
  cout<<m<<endl;
}


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