1. write a program that reads package weights and calculate the post fee based on the following
scheme
$3.5,if w<=1
'' $ 5.5 if W>=1 and <3
$8.5 if w>=3 and <10
$10.5 if w>=10 and <20
other weight should be 'ERROR"
Solution
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int weight;
cout<<"Enter the weight";
cin>>weight;
if(w<=1)
{
cout<<"Post fee is $3.5"<<endl;
}
if(w<3 && w>=1)
{
cout<<"Post fee is $5.5"<<endl;
}
if(w<10 && w>=3)
{
cout<<"Post fee is $8.5"<<endl;
}

2. if(w<20 && w>10)
{
cout<<"Post fee is $10.5"<<endl;
}
else
cout<<"ERROR";
getch();
}