can someone please tell me what is the error in this code
#include
using namespace std;
int maximum(int x,int y,int z,int w)
{
if(x>=y && x>=z && x>=w)
return x;
else if(y>=x && y>=z && y>=w)
return y;
else if(z>=y && z>=x && z>=w)
return z;
else
return w;
}
int main()
{
int t,i,a,b,n,p,q,r,s,sum,m1,m2,m3,m4;
cin>>n;
while(n–)
{
cin>>a>>b;
if(a<10 && b<10)
{
sum=a+b;
cout<<sum;
}
else if(a<10 && b>10)
{
if(b/10<a)
{
a=a*10+b%10;
b=b/10;
sum=a+b;
cout<<sum<<endl;
}
else
{
sum=a+b;
cout<<sum<<endl;
}
}
else if(b<10 && a>10)
{
if(a/10<b)
{
b=b*10+a%10;
a=a/10;
sum=a+b;
cout<<sum<<endl;
}
else
{
sum=a+b;
cout<<sum;
cout<<endl;
}
}
else
{
p=a%10;
q=a/10;
r=b%10;
s=b/10;
m1=q*10+p+s*10+r;
m2=q*10+s+p*10+r;
m3=q*10+r+s*10+p;
m4=r*10+p+s*10+q;
sum=maximum(m1,m2,m3,m4);
cout<<sum<<endl;
}
}
return 0;
}