C++ Program Training Function Parameters

#include<iostream>
using namespace std;

float banding(float bil1,float bil2){
    if (bil1>bil2)return bil1;
    else return bil2;

}
int min(int x, int y){
    if (x<y)return x;
    else return y;
}
int min(int x,int y, int z){
    int temp;
    if (x<y) temp=x;
    else temp = y;
    if (z<temp) temp = z;
    return temp;
}
int min(int x,int y, int z,int w){
    int temp;
    if (x<y) temp=x;
    else temp = y;
    if (z<temp) temp = z;
    if (w<temp) temp = w;
    return temp;
}
main(){
    float a,b;
    int x,y,z,w;
    cout<<"Masukkan Bilangan 1 : ";cin>>a;
    cout<<"Masukkan Bilangan 2 : ";cin>>b;
    cout<<"Bilangan Terbesar = "<<banding(a,b)<<endl;
    cout<<"Bilangan 1 : ";cin>>x;
    cout<<"Bilangan 2 : ";cin>>y;
    cout<<"Bilangan 3 : ";cin>>z;
    cout<<"Bilangan 4 : ";cin>>w;
    cout<<"Minimum Bil1,Bil2 = "<<min(x,y)<<endl;
    cout<<"Minimum Bil1,Bil2,Bil3 = "<<min(x,y,z)<<endl;
    cout<<"Minimum Bil1,Bil2,Bil3,Bil4 = "<<min(w,x,y,z)<<endl;
}