i got these 2 programs, i wrote them but i get an error in the last 3 lines in t

Question

i got these 2 programs, i wrote them but i get an error in the last 3 lines in the c++ program and in the last line in the c program, can any programmer help me

#include<iostream>
using namespace std;
int main()
{
const int QUARTER=25,DIME=10,NECKLE=5,PENNY=1;
int num_quarters,num_dimes,num_nickels,num_pennies,total_cents,remainder,again;

cout<<"This program will calculate the minimal number of coins needed ";
cout<<"in order to make change for a given amount of cents. ";
cout<<" ";
do
{
cout<<"Please enter an amount in cents: ";
cin>>total_cents;
if(total_cents<0)
{
cout<<"Cannot calculate negative change";
}
else
{
cout<<"The optimal change for 41 cent(s) is:";
num_quarters=total_cents/25;
remainder=total_cents%25;
num_dimes=remainder/10;
remainder=remainder%10;
num_nickels=remainder/5;
remainder=remainder%5;
num_pennies=remainder;
if(num_quarters>0)
{
cout<<num_quarters<<"quarter";
if(num_quarters>1)
{
cout<<"s";
}
}
if(num_dimes>0)
{
cout<<num_dimes<<"dime";
if(num_dimes>1)
{
cout<<"s";
}
}
if(num_nickels>0)
{
cout<<num_nickels<<"nickel";
if(num_nickels>1)
{
cout<<"s";
}
}
if(num_pennies>0)
{
cout<<num_pennies<<"penny";
if(num_pennies>1)
{
cout<<"s";
}
}
cout<<"Would you like to calculate change again (Y/N)? ";
cin>>again;
}while(again=='y'\again=='Y')
return 0;
}




#include<stdio.h>
int main()
{
double radius,area,surface_area,volume,circumference;
int option;
const double PI=3.1415926;
printf("Choose an option to calculate:");
printf(" (1) Circumference of a circle");
printf(" (2) Area of a circle");
printf(" (3) Surface area of a sphere");
printf(" (4) Volume of a sphere");
printf(" (5) Quit");
printf(" ");
do
{
printf("Enter option => ");
scanf("%i",&option);
switch(option)
{
case1:
printf("Enter the radius => ");
scanf("%lf",& radius);
circumference=(2*PI)*radius;
printf("The circumference is %4f"),circumference;
break;
pintf(" ");
case2:
printf("Enter the radius => ");
scanf("%lf",& radius);
area=PI*(radius*radius);
printf("The area is %4f"),area;
break;
pintf(" ");
case3:
printf("Enter the radius => ");
scanf("%lf",& radius);
surface_area=4*PI*(radius*radius);
printf("The surface_area is %4f"),surface_area;
break;
pintf(" ");
case4:
printf("Enter the radius => ");
scanf("%lf",& radius);
volume=(4.0/3)*PI*radius*radius*radius;
printf("The volume is %4f"),volume;
break;
} while (option!=5);
printf("Thanks for playing!");
return 0;
}

Explanation / Answer

please rate - thanks

or is || not \

plus fixed some other stuff

indent-makes life easier

#include<iostream>
using namespace std;
int main()
{
const int QUARTER=25,DIME=10,NECKLE=5,PENNY=1;
int num_quarters,num_dimes,num_nickels,num_pennies,total_cents,remainder;
char again;

cout<<"This program will calculate the minimal number of coins needed ";
cout<<"in order to make change for a given amount of cents. ";
cout<<" ";
do
{
cout<<"Please enter an amount in cents: ";
cin>>total_cents;
if(total_cents<0)
    {
     cout<<"Cannot calculate negative change";
     }
   else
     {
      cout<<"The optimal change for "<<total_cents<<" cent(s) is: ";
      num_quarters=total_cents/25;
      remainder=total_cents%25;
      num_dimes=remainder/10;
      remainder=remainder%10;
      num_nickels=remainder/5;
      remainder=remainder%5;
      num_pennies=remainder;
      }
   if(num_quarters>0)
      {
        cout<<num_quarters<<" quarter";
        if(num_quarters>1)
           {
            cout<<"s";
            }
        cout<<endl;
       }
    if(num_dimes>0)
       {
        cout<<num_dimes<<" dime";
        if(num_dimes>1)
           {
            cout<<"s";
            }
         cout<<endl;  
        }
     if(num_nickels>0)
        {
         cout<<num_nickels<<" nickel";
         if(num_nickels>1)
            {
             cout<<"s";
              }
            cout<<endl;
          }
     if(num_pennies>0)
         {
         cout<<num_pennies<<" penny";
         if(num_pennies>1)
           {
            cout<<"s";
            }
          cout<<endl;
         }
cout<<"Would you like to calculate change again (Y/N)? ";
cin>>again;
}while(again=='y'||again=='Y');
system("pause");

return 0;
}

----------------------

you wanted not , bunch of other problems

#include<stdio.h>
int main()
{
double radius,area,surface_area,volume,circumference;
int option;
const double PI=3.1415926;

do
{printf("Choose an option to calculate:");
printf(" (1) Circumference of a circle");
printf(" (2) Area of a circle");
printf(" (3) Surface area of a sphere");
printf(" (4) Volume of a sphere");
printf(" (5) Quit");
printf(" ");
printf("Enter option => ");
scanf("%i",&option);
switch(option)
    {
    case 1:
          printf("Enter the radius => ");
          scanf("%lf",& radius);
          circumference=(2*PI)*radius;
          printf("The circumference is %4f",circumference);
          printf(" ");
          break;
    case 2:
          printf("Enter the radius => ");
          scanf("%lf",& radius);
          area=PI*(radius*radius);
          printf("The area is %4f",area);
          printf(" ");
          break;
    case 3:
          printf("Enter the radius => ");
          scanf("%lf",& radius);
          surface_area=4*PI*(radius*radius);
          printf("The surface_area is %4f",surface_area);
          printf(" ");
          break;
    case 4:
          printf("Enter the radius => ");
          scanf("%lf",& radius);
          volume=(4.0/3)*PI*radius*radius*radius;
          printf("The volume is %4f",volume);
          break;
    }
   printf(" ");   
} while (option!=5);
printf("Thanks for playing!");
return 0;
}

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