Modular programming
Hi, i am requested to created a simple game by my teacher.
this is the correct program and runable:
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#include <iostream.h>
#include <conio.h>
#include <iomanip.h>
void main()
{
char next='y';
float answer, jawapan, mark, count, first_rand, second_rand;
int symbol_rand;
cout << setiosflags(ios::left);
cout << setw(25) <<" "<< "Welcome to Arimetric Game ~ !!"<<endl;
cout << setw(20) <<" "<<"There will be 10 questions per sessions."<<endl;
cout << setw(24) <<" "<<"Each question carries 10 marks."<<endl ;
cout << setw(22) <<" "<<"Lets see how good are you at Maths!"<<endl;
cout << setw(30) <<" "<<"Let the game begin ! "<<endl;
srand((unsigned)time(NULL)) ;
while (next =='y'|| next=='Y')
{
mark = 0;
for (count=1;count<11;count++)
{
first_rand = rand()%100+1;
second_rand = rand()%100+1;
symbol_rand = rand()%4+1;
cout << "\nQuestion " << count << endl ;
switch (symbol_rand)
{
case 1: cout << first_rand << " + " << second_rand <<" = ";
answer = first_rand + second_rand; break;
case 2: cout << first_rand << " - "<< second_rand <<" = ";
answer = first_rand - second_rand; break;
case 3: cout << first_rand << " * "<< second_rand <<" = ";
answer = first_rand * second_rand; break;
case 4: cout << "Please input answer in 2 decimal place :"<<endl;
cout << first_rand << " / "<< second_rand <<" = ";
answer = first_rand / second_rand; break;
}
cin >> jawapan ;
if( jawapan-answer >=-0.01&&jawapan-answer<=0.01)
{
mark=mark+10;
cout << "\n\t\t\t\t\t\tCorrect! +10 Marks"<<endl ;
}
else
{
mark-=5;
cout << "\n\t\t\t\t\t\tWrong! -5 Marks " << endl ; } }
cout << "\nYou have scored " << mark << " marks. "<<endl <<endl;
cout << "Do you want to keep playing? " ;
cout << "\nType 'y' for yes and 'n' for no: " ;
cin >> next;
clrscr();
}
cout <<endl<<endl<<setiosflags(ios::right)<<setfill('*')<<setw(45)
<< "Game Over"<<setw(34)<<" "<<endl;
cout << "\n\t\t\t\t\tPress any key to exit . . ."<<endl;
getch();
}
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but i woulld like to make it into modular function so that i can get more marks,
so i edited it to :
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#include <iostream.h>
#include <conio.h>
#include <iomanip.h>
void main()
{
char next='y';
float answer, jawapan, mark, count, first_rand, second_rand;
int symbol_rand;
double check (double,double);
cout << setiosflags(ios::left);
cout << setw(25) <<" "<< "Welcome to Arimetric Game ~ !!"<<endl;
cout << setw(20) <<" "<<"There will be 10 questions per sessions."<<endl;
cout << setw(24) <<" "<<"Each question carries 10 marks."<<endl ;
cout << setw(22) <<" "<<"Lets see how good are you at Maths!"<<endl;
cout << setw(30) <<" "<<"Let the game begin ! "<<endl;
srand((unsigned)time(NULL)) ;
while (next =='y'|| next=='Y')
{
mark = 0;
for (count=1;count<11;count++)
{
first_rand = rand()%100+1;
second_rand = rand()%100+1;
symbol_rand = rand()%4+1;
float check (float,float);
cout << "\nQuestion " << count << endl ;
switch (symbol_rand)
{
case 1: cout << first_rand << " + " << second_rand <<" = ";
answer = first_rand + second_rand; break;
case 2: cout << first_rand << " - "<< second_rand <<" = ";
answer = first_rand - second_rand; break;
case 3: cout << first_rand << " * "<< second_rand <<" = ";
answer = first_rand * second_rand; break;
case 4: cout << "Please input answer in 2 decimal place :"<<endl;
cout << first_rand << " / "<< second_rand <<" = ";
answer = first_rand / second_rand; break;
}
cin >> jawapan ; }
cout << "\nYou have scored " << check(jawapan,answer) << " marks. "<<endl <<endl;
cout << "Do you want to keep playing? " ;
cout << "\nType 'y' for yes and 'n' for no: " ;
cin >> next;
clrscr();
}
cout <<endl<<endl<<setiosflags(ios::right)<<setfill('*')<<setw(45)
<< "Game Over"<<setw(34)<<" "<<endl;
cout << "\n\t\t\t\t\tPress any key to exit . . ."<<endl;
getch();
}
double check (a, b)
{int mark;
if( a-b >=-0.01&&a-b<=0.01)
{
mark=mark+10;
cout << "\n\t\t\t\t\t\tCorrect! +10 Marks"<<endl ;
}
else
{
mark-=5;
cout << "\n\t\t\t\t\t\tWrong! -5 Marks " << endl ; }
return mark;
}
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but it shows linker error, when i try to compile it. whats wrong with it/?
Last edited on
Why is your code unindented and what is your link error?
It shows linker error: undesollved external check(double,double)
whats wrong with my function header?
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