Function creation and function call in c copy
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This document discusses functions in C programming. It defines built-in functions as pre-defined subprograms in the C language compiler, and user-defined functions as those created by the programmer. Examples are given of programs using built-in functions like scanf(), printf(), and strcpy(), as well as user-defined functions with passing arguments by value and reference. The last section provides contact details for Baabtra Mentoring Partner.
![Program using Built in
functions (library functions)
•
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char s1[20];
char s2[20];
int l;
clrscr();
printf(“Enter the two stringsn”);
scanf(“%s%s”,s1,s2);
l=strlen(s1);
printf(“length of the string is %d”,&l);
strcat(s1,s2);
printf(“combined string=%s”,s1);
getch();
}](https://image.slidesharecdn.com/functioncreationandfunctioncallinc-copy-131116023048-phpapp02/85/Function-creation-and-function-call-in-c-copy-8-320.jpg)
Function creation and function call in c copy
- 2. Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
- 5. Function creation & Function call in c Muhammed Noufal V T muhammednoufalvt@gmail.c om www.facebook.com/vtnoufa lvt twitter.com/noufalurnappy in.linkedin.com/pub/muham med-noufal 9744003056
- 6. Functions in c • Types of functions - Built in functions (library functions) - User defined functions • Advantagas -Decrease the length of the program -Easy to manipulate
- 7. Built in functions (library functions) • Sub programs that is already defined in c language compiler • Syntax to call a function function name(); • Examples :scanf(); printf(); clrscr(); strcpy();
- 8. Program using Built in functions (library functions) • #include<stdio.h> #include<conio.h> #include<string.h> void main() { char s1[20]; char s2[20]; int l; clrscr(); printf(“Enter the two stringsn”); scanf(“%s%s”,s1,s2); l=strlen(s1); printf(“length of the string is %d”,&l); strcat(s1,s2); printf(“combined string=%s”,s1); getch(); }
- 9. User defined functions • Functions defined by user • Advantagas -Reusability -Easy to manipulate • Syntax to declare a user defined function data type function name(); • Syntax to define a user defined function data type function name() { function body; }
- 10. Program using user defined functions • #include<stdio.h> #include<stdio.h> void main() { clrscr(); add(); getch(); } int add() { int a,b,c; printf(“Enter two numbers to addn”); scanf(“%d%d”,&a,&b); c=a+b; printf(“Addition of the two numbers=%d”,&c) }
- 11. user define functions • Default function -Function which doesn’t support parameter variables • Parameter function -Function which contains parameter variables Syntax data type function name(data type variable 1,… variable n) • Return statement -The statement which return values from functions to calling sections • Methods of passing argument values to parameterized function
- 12. Program using pass by value method #include<stdio.h> #include<conio.h> int add(int,int); void main() { int a,b,c; clrscr(); printf(“Enter two numbersn”); scanf(“%d%d”,&a,&b); c=add(a,b); printf(“Addition=%d”,&c); getch(); } int add(int n, int m) { int s; s=n+m; return(s); }
- 13. Program using pass by referanceint add(int *x,int *y) method #include<stdio.h> #include<conio.h> int add(int *x,int *y) void main() { int a,b,c,*p1,*p2; clrscr(); printf(“Enter two numbers”); scanf(“%d%d”,&a,&b); p1=&a; p2=&b; c=add(p1,p2); printf(“addition=%d”,c); getch(); } { int *z; *z=*x+*y; return(*z); }
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