WAP to Use of strcmp() function

/*WAP to Use of strcmp() function */

#include<stdio.h>
#include<conio.h>
main( )
{
 char  string1[ ] = "Jerry" ;
 char  string2[ ] = "Ferry" ;
 int  i, j, k ;

 i = strcmp ( string1, "Jerry" ) ;
 j = strcmp ( string1, string2 ) ;
 k = strcmp ( string1, "Jerry boy" ) ;

 printf ( "\n%d %d %d", i, j, k ) ;
}

WAP to Use of strcat() function

/*WAP to Use of strcat() function */

#include<stdio.h>
#include<conio.h>
main( )
{
 char  source[ ] = "Folks!" ;
 char  target[30] = "Hello" ;

 strcat ( target, source ) ;
 printf ( "\nsource string = %s", source ) ;
 printf ( "\ntarget string = %s", target ) ;
}

WAP to Use of const keyword

/*WAP to Use of const keyword */

#include<stdio.h>
#include<conio.h>
main( )
{
 float r, a ;
 const float pi = 3.14 ;

 printf ( "\nEnter radius of circle " ) ;
 scanf  ( "%f", &r ) ;
 a = pi * r * r ;
 printf ( "\nArea of circle = %f", a ) ;
}

WAP to copy string without changing source string

/*WAP to copy string without changing source string */

#include<stdio.h>
#include<conio.h>
main( )
{
 char  source[ ] = "codezworld" ;
 char  target[20] ;

 xstrcpy ( target, source ) ;
 printf ( "\nsource string = %s", source ) ;
 printf ( "\ntarget string = %s", target ) ;
}

void xstrcpy ( char *t, const char *s )
{
 while ( *s != '\0' )
 {
  *t = *s ;
  s++ ;
  t++ ;
 }
 *t = '\0' ;
}