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C Prog - Functions
Functions in C allow programmers to organize code into self-contained blocks that perform specific tasks. A function is defined with a name and can accept parameters. The main() function is where program execution begins. Several examples are provided that demonstrate defining and calling functions to perform tasks like addition, incrementing values, and displaying output. Functions can access variables in their own scope as well as variables passed into them as parameters.
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C Prog - Functions
- 1. C Programming -Functions Organized By: Vinay Arora Assistant Professor, CSED Thapar University, Patiala
- 2. Main program &its sub parts Function is also known as sub-program or module. Function is a self contained block of statements that perform coherent task of some kind. Vinay Arora CSED
- 3. Program-1 #include<stdio.h> #include<conio.h> void main() { clrscr(); printf("n Message for You"); printf("n Department of Civil Engineering"); getch(); } Vinay Arora CSED
- 4. Program-1 (output) Vinay Arora CSED
- 5. Program-2 #include<stdio.h> #include<conio.h> void main() { clrscr(); message(); printf("n Department of Civil Engineering"); getch(); } message() { printf("n Message for You"); } Vinay Arora CSED
- 6. Program-2 (output) Vinay Arora CSED
- 7. Program-3 #include<stdio.h> #include<conio.h> void message(); void main() { clrscr(); message(); printf("n Department of Civil Engineering"); getch(); } void message() { printf("n Message for You"); } Vinay Arora CSED
- 8. Program-3 (output) Vinay Arora CSED
- 9. Program-4 #include<stdio.h> void civil() #include<conio.h> { printf("nCivil Engg."); void civil(); } void computer(); void electronics(); void computer() { void main() printf("nComputer Engg."); { } clrscr(); void electronics() civil(); { computer(); printf("nElectronics Engg."); electronics(); } printf("nnDepartments at Thapar"); getch(); } Vinay Arora CSED
- 10. Program-4 #include<stdio.h> void civil() #include<conio.h> { printf("nCivil Engg."); void civil(); } void computer(); void electronics(); void computer() { void main() printf("nComputer Engg."); { } clrscr(); void electronics() civil(); { computer(); printf("nElectronics Engg."); electronics(); } printf("nnDepartments at Thapar"); getch(); } Vinay Arora CSED
- 11. Program-4 (output) Vinay Arora CSED
- 12. Program-5 #include<stdio.h> void civil() #include<conio.h> { printf("nCivil Engg."); void civil(); computer(); void computer(); } void electronics(); void computer() void main() { { printf("nComputer Engg."); clrscr(); electronics(); } civil(); void electronics() printf("nnDepartments at Thapar"); { printf("nElectronics Engg."); getch(); } } Vinay Arora CSED
- 13. Program-5 #include<stdio.h> void civil() #include<conio.h> { printf("nCivil Engg."); void civil(); computer(); void computer(); } void electronics(); void computer() void main() { { printf("nComputer Engg."); clrscr(); electronics(); } civil(); void electronics() printf("nnDepartments at Thapar"); { printf("nElectronics Engg."); getch(); } } Vinay Arora CSED
- 14. Program-5 (output) Vinay Arora CSED
- 15. Program-6 #include<stdio.h> void civil() #include<conio.h> { printf("nCivil Engg."); void civil(); } void main() { clrscr(); civil(); civil(); printf("nnDepartments at Thapar"); getch(); } Vinay Arora CSED
- 16. Program-6 #include<stdio.h> void civil() #include<conio.h> { printf("nCivil Engg."); void civil(); } void main() { clrscr(); civil(); civil(); printf("nnDepartments at Thapar"); getch(); } Vinay Arora CSED
- 17. Program-6 (output) Vinay Arora CSED
- 18. Program-7 #include<stdio.h> #include<conio.h> void main() { int a,b,c; clrscr(); printf("Enter Numbers for Additionn"); printf("Enter 1st Number:t"); scanf("%d",&a); printf("Enter 2nd Number:t"); scanf("%d",&b); c=a+b; printf("Result after Addition is:%d",c); getch(); } Vinay Arora CSED
- 19. Program-7 (output) Vinay Arora CSED
- 20. Program-8 #include<stdio.h> void sum() #include<conio.h> { int a,b,c; void sum(); printf("Enter Numbers for Additionn"); void main() printf("Enter 1st Number:t"); { scanf("%d",&a); clrscr(); printf("Enter 2nd Number:t"); sum(); scanf("%d",&b); getch(); } c=a+b; printf("Result after Addition is:%d",c); } Vinay Arora CSED
- 21. Program-8 (output) Vinay Arora CSED
- 22. Program-9 #include<stdio.h> void sum(int x,int y) #include<conio.h> { int z; void sum(); z=x+y; void main() printf("Result after Addition is:%d",z); { } int a,b,c; clrscr(); printf("Enter Numbers for Additionn"); printf("Enter 1st Number:t"); scanf("%d",&a); printf("Enter 2nd Number:t"); scanf("%d",&b); sum(a,b); getch(); } Vinay Arora CSED
- 23. Program-9 (output) Vinay Arora CSED
- 24. Program-10 #include<stdio.h> int sum(int x,int y) #include<conio.h> { int z; int sum(); z=x+y; void main() return (z); { } int a,b,c; clrscr(); printf("Enter Numbers for Additionn"); printf("Enter 1st Number:t"); scanf("%d",&a); printf("Enter 2nd Number:t"); scanf("%d",&b); c=sum(a,b); printf("Result after Addition is:%d",c); getch(); } Vinay Arora CSED
- 25. Program-10 (output) Vinay Arora CSED
- 26. Program-11 #include<stdio.h> int increment(int x) #include<conio.h> { x++; int increment(); return (x); void main() } { int a,b,c; clrscr(); printf("Enter Numbert"); scanf("%d",&a); c=increment(a); printf("Result after Increment will be:%d",c); getch(); } Vinay Arora CSED
- 27. Program-11 (output) Vinay Arora CSED
- 28. Program-12 #include<stdio.h> #include<conio.h> void display(); void main() { int a=20; clrscr(); display(a); getch(); } void display(int x) { int y=27; printf("Value passed from main function is %dn",x); printf("Value present in display function is %d",y); } Vinay Arora CSED
- 29. Program-12 (output) Vinay Arora CSED
- 30. Program-13 #include<stdio.h> void display() #include<conio.h> { int x=25; void display(); void main() printf("Value of x in display function is %d",x); { } int x=20; clrscr(); printf("Value of x in main function %dn",x); display(); getch(); } Vinay Arora CSED
- 31. Program-13 (output) Vinay Arora CSED
- 32. Program-14 #include<stdio.h> void display(int x) #include<conio.h> { x=77; void display(); void main() printf("Value of x in display function is %d",x); { } int x=20; clrscr(); printf("Value of x in main function %dn",x); display(); getch(); } Vinay Arora CSED
- 33. Program-14 (output) Vinay Arora CSED
- 34. Program-15 #include<stdio.h> int increment(int a) #include<conio.h> { a++; void display(); return (a); void main() } { int a,b; int decrement(int a) clrscr(); { a--; printf("Enter Numbert"); return (a); scanf("%d",&a); } b=increment(a); printf("nValue after increment is %dt",b); b=decrement(a); printf("nValue after decrement is %dt",b); getch(); } Vinay Arora CSED
- 35. Program-15 (output) Vinay Arora CSED
- 36. Program-17 #include<stdio.h> #include<conio.h> int increment(); void main() { int i=10,j=20,k=30; clrscr(); printf("%dt%dt%dn",i,j,k); printf("%dt%dt%dn",i,j); printf("%dn",i,j); getch(); } Vinay Arora CSED
- 37. Program-17 (output) Vinay Arora CSED
- 38. Program-18 #include<stdio.h> float square(float x) #include<conio.h> { float y; float square(float); y=x*x; void main() return(y); { } float a,b; clrscr(); printf("Enter any Number:"); scanf("%f",&a); b=square(a); printf("Square of number entered is %ft",b); getch(); } Vinay Arora CSED
- 39. Program-18 (output) Vinay Arora CSED
- 40. Program-19 #include<stdio.h> int factorial(int x) #include<conio.h> { int f=1,i; void main() { for(i=x;i>=1;i--) int a,fact; f=f*i; clrscr(); return(f); printf("Enter any Number:"); } scanf("%d",&a); fact=factorial(a); printf("Factorial Value is = %dn",fact); getch(); } Vinay Arora CSED
- 41. Program-19 (output) Vinay Arora CSED
- 42. Program-20 (Recursion inC) #include<stdio.h> int rec(int x) #include<conio.h> { int f; int rec(int); void main() if(x==1) { return(1); int a,fact; else clrscr(); f=x*rec(x-1); printf("Enter any Number:"); return(f); scanf("%d",&a); } fact=rec(a); printf("Factorial Value is = %dn",fact); getch(); } Vinay Arora CSED
- 43. Recursion Vinay Arora CSED
- 44. Program-20 (output) Vinay Arora CSED
- 45. Program-21 #include<stdio.h> #include<conio.h> void main() { int i; clrscr(); for(i=0;i<=50000;i++) printf("%dn",i); getch(); } Vinay Arora CSED
- 46. Program-21 (output) Vinay Arora CSED
- 47. Program-22 #include<stdio.h> void val() #include<conio.h> { i=100; int i=0; printf("Val's i=%dn",i); void val(); i++; } void main() { clrscr(); printf("Main's i=%dn",i); i++; val(); printf("Main's i=%dn",i); val(); getch(); } Vinay Arora CSED
- 48. Program-22 (output) Vinay Arora CSED
- 49. Program-23 #include<stdio.h> #include<conio.h> void main() { int count=5; clrscr(); printf("Count=%dn",count); count--; if(count>0) main(); else exit(); getch(); } Vinay Arora CSED
- 50. Program-23 (output) INFINITE LOOP Vinay Arora CSED
- 51. Program-24 #include<stdio.h> int g(int x) #include<conio.h> { int v=1; int g(int); int b=3; void main() { v+=x; int i,j; return(v+x+b); clrscr(); } for(i=1;i<5;i++) { j=g(i); printf("%dn",j); } getch(); } Vinay Arora CSED
- 52. Program-24 (output) Vinay Arora CSED
- 53. Program-25 #include<stdio.h> #include<conio.h> int x=10; void main() { int x=20; clrscr(); { int x=30; printf("%dn",x); } printf("%dn",x); getch(); } Vinay Arora CSED
- 54. Program-25 (output) Vinay Arora CSED
- 55. Program-26 #include<stdio.h> void func() #include<conio.h> { int i,j,k; void func(); i=j=k=0; void main() { i++;j++;k++; clrscr(); printf("%d%d%dn",i,j,k); func(); } func(); getch(); } Vinay Arora CSED
- 56. Program-26 (output) Vinay Arora CSED
- 57. Thnx… VinayArora CSED