1. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
C++ CODES PART#09
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

2. USER DEFINE FUNCTION TO CALCULATE CUBE OF A NUMBER
#include<constream.h> int cube(int); void main() {clrscr(); int x; cout<<"\n enter any number:";
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

3. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
cin>>x;
cout<<"\n cube of\t" <<x<< "\t is" <<"\t"<<cube(x);
getch();}
//user define function
int cube(int x) {
return x*x*x; }
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

4. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT…..
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

5. Two different ways to write The same function
Method1:
#include<constream.h>
int sum(void);
void main()
{clrscr();
int c;
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

6. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE….
c=sum();
cout<<endl<<c;
getch();}
int sum(void){
int x=13,y=13;
return x+y; }
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

7. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT…..
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

8. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
Method 2:
#include<constream.h>
int sum(void);
int sum(void){
int x=13,y=13;
return x+y; }
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

9. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE….
void main()
{clrscr();
int c;
c=sum();
cout<<endl<<c;
getch();}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

10. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT…
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

11. Argument passing example
#include<constream.h> void call(int x) {cout<<x+8; } void main() {clrscr();
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

12. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
int x;
cin>>x;
call(x);
getch();}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

13. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT….
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

14. Multiple argument passing
#include<constream.h> void call(int x,int y) {cout<<x+y; } void main() {clrscr();
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

15. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE….
int x,y; cin>>x>>y; call(x,y); getch();}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

16. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT…
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

17. Return function argument
#include<constream.h> int fun(int x,float y) {return x*y; } void main() {clrscr();
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

18. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE….
int a;
float b;
cin>>a>>b;
cout<<fun(a,b);
getch();}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

19. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT….
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

20. Factorial program by function
#include<constream.h> int fact(int a) {int b,c=1; for(b=a;b>=1;--b) {c=c*b;} return c; }
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

21. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
void main() {
clrscr();
int a;
cin>>a;
{cout<<fact(a);}
getch();}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

22. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT…
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

23. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
Recursion
#include<constream.h> int fact(int a){ if(a==1||a==0) return 1; else return a*fact(a-1);}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

24. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
void main() {clrscr(); int x; cin>>x; cout<<fact(x); getch();}
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

25. 3 OF THE POSSIBLE OUTPUTS…
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

26. Nested user define function
#include<constream.h> int sumsqr(int,int); int sum(int,int); int sqr(int); void main() {clrscr();
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

27. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE….
int x,y; cout<<"\n enter any two numbers:"; cin>>x>>y; cout<<"\nthe square of "<<x<<"is"<<sqr(x); cout<<"\n the square of "<<y<<"is"<<sqr(y);
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

28. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
cout<<"\n the sum of the squares is"<<sumsqr(x,y);
getch(); }
//udf sum of the squares
int sumsqr(int a,int b)
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

29. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE… {
return sum(sqr(a),sqr(b));}
//udf square of the numbers
int sqr(int c)
{return c*c;
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

30. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE… }
//udf square of the numbers
int sum(int d,int e)
{return d+e;
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

31. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT…
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

32. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
Function overloading
#include <constream.h> // This program illustrate the use of Function overloading int sqr(int x); float sqr(float x); double sqr(double x);
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

33. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
void main(void)
{ // declare three variable of different types
clrscr();
int val1=4;
float val2=4.1;
double val3= ;
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

34. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
// get the data from the user and call each version of function
cout << "Square of 4 is " << sqr(val1) << "\n";
cout << "Square of 4.1 is " << sqr(val2) << "\n";
cout << "Square of is" << sqr(val3) << "\n";
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

35. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
getch(); }
// now declare the three function versions
int sqr(int x) {
return(x*x);
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

36. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
CONTINUE…
float sqr(float x) {
return(x*x); }
double sqr(double x) {
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

37. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
OUTPUT……
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT

38. COPY RIGHT@ ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT
NICE WORDINGS
Apnay dushman ko hazar mouqa do k woh tumara dost ban jaye. LEKIN apnay dost ko 1 bhi moqa na do k woh tumara dushman ban jaiy.
COPY ENGR.SABA MUGHAL FROM COMPUTER SYSTEMS DEPARTMENT