Write a Program in C That Using Function Strtod

// Using function strtod
#include <stdio.h>
#include <stdlib.h>

int main( void )
{
   // initialize string pointer
   const char *string = "51.2% are admitted"; // initialize string

   double d; // variable to hold converted sequence
   char *stringPtr; // create char pointer
 
   d = strtod( string, &stringPtr );
 
   printf( "The string \"%s\" is converted to the\n", string );
   printf( "double value %.2f and the string \"%s\"\n", d, stringPtr );
} // end main

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Write a Program in C That Using Functions Isspace, Iscntrl, Ispunct, Isprint, Isgraph

// Using functions isspace, iscntrl, ispunct, isprint, isgraph

#include <stdio.h>

#include <ctype.h>

int main( void )

{

   printf( "%s\n%s%s%s\n%s%s%s\n%s%s\n\n", 

       "According to isspace:", 

       "Newline", isspace( '\n' ) ? " is a " : " is not a ",

       "whitespace character", "Horizontal tab",

       isspace( '\t' ) ? " is a " : " is not a ", 

       "whitespace character",

       isspace( '%' ) ? "% is a " : "% is not a ",

       "whitespace character" );

   printf( "%s\n%s%s%s\n%s%s\n\n", "According to iscntrl:", 

       "Newline", iscntrl( '\n' ) ? " is a " : " is not a ",

       "control character", iscntrl( '$' ) ? "$ is a " : 

       "$ is not a ", "control character" );

   printf( "%s\n%s%s\n%s%s\n%s%s\n\n", 

       "According to ispunct:",

       ispunct( ';' ) ? "; is a " : "; is not a ", 

       "punctuation character",

       ispunct( 'Y' ) ? "Y is a " : "Y is not a ",

       "punctuation character",

       ispunct( '#' ) ? "# is a " : "# is not a ",

       "punctuation character" );

   printf( "%s\n%s%s\n%s%s%s\n\n", "According to isprint:",

       isprint( '$' ) ? "$ is a " : "$ is not a ", 

       "printing character", 

       "Alert", isprint( '\a' ) ? " is a " : " is not a ",

       "printing character" );

   printf( "%s\n%s%s\n%s%s%s\n",  "According to isgraph:",

       isgraph( 'Q' ) ? "Q is a " : "Q is not a ",

       "printing character other than a space",

       "Space", isgraph( ' ' ) ? " is a " : " is not a ",

       "printing character other than a space" );

} // end main

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Write a Program in C That Using Functions Islower, Isupper, Tolower, Toupper

// Using functions islower, isupper, tolower, toupper

#include <stdio.h>

#include <ctype.h>

int main( void )

{ 

   printf( "%s\n%s%s\n%s%s\n%s%s\n%s%s\n\n",

      "According to islower:",

      islower( 'p' ) ? "p is a " : "p is not a ",

      "lowercase letter",

      islower( 'P' ) ? "P is a " : "P is not a ",

      "lowercase letter",

      islower( '5' ) ? "5 is a " : "5 is not a ",

      "lowercase letter",

      islower( '!' ) ? "! is a " : "! is not a ",

      "lowercase letter" );

   printf( "%s\n%s%s\n%s%s\n%s%s\n%s%s\n\n",

      "According to isupper:",

      isupper( 'D' ) ? "D is an " : "D is not an ",

      "uppercase letter",

      isupper( 'd' ) ? "d is an " : "d is not an ",

      "uppercase letter",

      isupper( '8' ) ? "8 is an " : "8 is not an ",

      "uppercase letter",

      isupper( '$' ) ? "$ is an " : "$ is not an ",

      "uppercase letter" );

   printf( "%s%c\n%s%c\n%s%c\n%s%c\n",

      "u converted to uppercase is ", toupper( 'u' ),

      "7 converted to uppercase is ", toupper( '7' ),

      "$ converted to uppercase is ", toupper( '$' ),

      "L converted to lowercase is ", tolower( 'L' ) );

} // end main

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Write a Program in C That Using Functions Isdigit, Isalpha, Isalnum, and Isxdigit

// Using functions isdigit, isalpha, isalnum, and isxdigit

#include <stdio.h>

#include <ctype.h>

 

int main( void )

{ 

   printf( "%s\n%s%s\n%s%s\n\n", "According to isdigit: ",

      isdigit( '8' ) ? "8 is a " : "8 is not a ", "digit",

      isdigit( '#' ) ? "# is a " : "# is not a ", "digit" );

   printf( "%s\n%s%s\n%s%s\n%s%s\n%s%s\n\n", 

      "According to isalpha:",

      isalpha( 'A' ) ? "A is a " : "A is not a ", "letter",

      isalpha( 'b' ) ? "b is a " : "b is not a ", "letter",

      isalpha( '&' ) ? "& is a " : "& is not a ", "letter",

      isalpha( '4' ) ? "4 is a " : "4 is not a ", "letter" );

   printf( "%s\n%s%s\n%s%s\n%s%s\n\n", 

      "According to isalnum:",

      isalnum( 'A' ) ? "A is a " : "A is not a ", 

      "digit or a letter",

      isalnum( '8' ) ? "8 is a " : "8 is not a ", 

      "digit or a letter",

      isalnum( '#' ) ? "# is a " : "# is not a ", 

      "digit or a letter" );

   printf( "%s\n%s%s\n%s%s\n%s%s\n%s%s\n%s%s\n", 

      "According to isxdigit:",

      isxdigit( 'F' ) ? "F is a " : "F is not a ", 

      "hexadecimal digit",

      isxdigit( 'J' ) ? "J is a " : "J is not a ", 

      "hexadecimal digit",

      isxdigit( '7' ) ? "7 is a " : "7 is not a ", 

      "hexadecimal digit",

      isxdigit( '$' ) ? "$ is a " : "$ is not a ", 

      "hexadecimal digit",

      isxdigit( 'f' ) ? "f is a " : "f is not a ", 

      "hexadecimal digit" );

} // end main

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