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#include<iostream.h>
#include<conio.h>
void main()
{
int a,b,c,big;
clrscr();
cout<<"enter any three no.:";
cin>>a>>b>>c;
big=a;
if(b>big)
big=b;
if(c>big)
big=c;
cout<<"largest of the three no.="<<big;
getch();
}

                                        Output
Enter three number :10  20  15
Largest of the three no.=20