# 5 6 T5 6 Yayi Wang 200905600

Document Sample

```					          T5.6

Yayi Wang 200905600 INFO
//T5.6
#include<iostream>
#include<iomanip>
using namespace std;

int main()
{
double total=0.0,
money1=0.0,money2=0.0,money3=0.0,money4=0.0,money5=0.0;
int product, quantity;

cout<<"Enter product number(1-5)(-1 to stop): ";
cin>>product;
cout<<fixed<<setprecision(2);

while(product!=-1)
{
cout<<"Enter quantity sold: ";
cin>>quantity;

switch(product)
{
case 1:
money1=quantity*2.98;
total=total+quantity*2.98;
break;

case 2:
money2=quantity*4.50;
total=quantity*4.50+total;
break;
case 3:
money3=quantity*9.98;
total=quantity*9.98+total;
break;
case 4:
money4=quantity*4.49;
total=quantity*4.49+total;
break;
case 5:
money5=quantity*6.87;
total=quantity*6.87+total;
break;
}
cout<<"Enter product number(1-5)(-1 to stop): ";
cin>>product;

}

cout<<"\nproduct1: \$"<<money1;
cout<<"\nproduct2: \$"<<money2;
cout<<"\nproduct3: \$"<<money3;
cout<<"\nproduct4: \$"<<money4;
cout<<"\nproduct5: \$"<<money5;
cout<<"\nTotal: \$"<<total;

return 0;
}

//5.7 part1
#include<iostream>
using namespace std;

int main()
{
int x,y,a,b,g,i,j;

cout<<"Enter x(-10 to quit): ";
cin>>x;
while(x!=-10)
{
cout<<"enter y: ";
cin>>y;

cout<<boolalpha;
cout<<"!(x<5): "<<(!(x<5));
cout<<"\n!(y>=7): "<<(!(y>=7));
if((!(x<5)&&!(y>=7))==(!((x<5)||(y>=7))))
cout<<"\n!(x<5)&&!(y>=7) is euivalent to !((x<5)||(y>=7))";
cout<<"\nEnter x(-10 to quit): ";
cin>>x;
}
return 0;
}

//5.7 part2
#include<iostream>
using namespace std;

int main()
{
int x,y,a,b,g,i,j;

cout<<"\nEnter a(-10 to quit): ";
cin>>a;
while(a!=-10)
{

cout<<"enter b: ";
cin>>b;
cout<<"enter g: ";
cin>>g;

cout<<boolalpha;
cout<<"\n!(a==b) "<<(!(a==b));
cout<<"\n!(g!=5) "<<(!(g!=5));
if((!(a==b)&&!(g!=5))==(!((a==b)||(g!=5))))
cout<<"\n!(a==b)&&!(g!=5) is euivalent to
!((a==b)||(g!=5))";
cout<<"\nEnter a(-10 to quit): ";
cin>>a;
}
return 0;
}

//5.7 part3
#include<iostream>
using namespace std;

int main()
{
int x,y,a,b,g,i,j;

cout<<"Enter x(-10 to quit): ";
cin>>x;
while(x!=-10)
{

cout<<"enter y: ";
cin>>y;

cout<<boolalpha;
cout<<"!((x<=8): "<<(!((x<=8)));
cout<<"\n(y>4): "<<((y>4));
if((!((x<=8)&&(y>4)))==(!(x<=8)||!(y>=4)))
cout<<"\n!((x<=8)&&(y>4)) is euivalent to
!(x<=8)||!(y>=4)";
cout<<"\nEnter x(-10 to quit): ";
cin>>x;
}
return 0;
}

//5.7 part4
#include<iostream>
using namespace std;

int main()
{
int x,y,a,b,g,i,j;

cout<<"Enter i(-10 to quit): ";
cin>>i;
while(i!=-10)
{

cout<<"enter j: ";
cin>>j;

cout<<boolalpha;
cout<<"(i>4): "<<((i>4));
cout<<"\n(j<=6): "<<((j<=6));
if((!((i>4)||(j<=6)))==(!(i>4)&&!(j<=6)))
cout<<"\n!((i>4)||(j<=6)) is euivalent to !(i>4)&&!(j<=6)";
cout<<"\nEnter i(-10 to quit): ";
cin>>i;
}
return 0;
}

```
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 views: 2 posted: 2/19/2012 language: pages: 6