k and r solution

K & R C Programs Exercise 2-3.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 2-3:
C Function htoi() which converts a string of hexa decimal digits into its equivalent integer value. K and R C Program. Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language . 

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#define YES 1
#define NO  0
//HTOI: CONVERT HEXADECIMAL STRING S TO INTEGER
int htoi(char s[])
{
 int hexdigit, i, inhex, n,i=0;
 if(s[i]=='0'){
  ++i;
  if(s[i]=='x' || s[i]=='x')
   ++i;
 }
 n=0;
 inhex=YES;
 for(;inhex==YES;++i){
  if(s[i]>='0' && s[i]<='9')
   hexdigit=s[i]-'0';
  else if(s[i]>='a' && s[i]<='f')
   hexdigit=s[i]-'a'+10;
  else if (s[i]>='A' && s[i]<='F')
   hexdigit=s[i]-'A'+10;
  else
   inhex=NO;
  if(inhex==YES)
   n=16*n+hexdigit;
 }
 return n;
}


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K & R C Programs Exercise 2-2.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 2-2:
C Program to demonstrate for and while loops. K and R C Program. Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

/*Write the equivalent to the below for loop without using && or ||.*/

// Original
 
 for(i=0; i<lim-1 && (c=getchar()) != 'n' && c != EOF; ++i)
  {
   s[i] = c;
  }
// Equivalent:
 

 while (i < (lim - 1))
 {
  c = getchar();

  if (c == EOF)
   break;
  else if (c == 'n')
   break;

  s[i++] = c;
 }

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K & R C Programs Exercise 2-1.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 2-1:
C program to determine the ranges of char, short, int and long variables, both signed and unsigned, by printing appropriate values from standard headers and by direct computation.the ANSIstandard for C specifies that ranges be defined in <limits.h>. K and R C Program. Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language . 

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include <stdio.h>
#include <limits.h>

int 
main ()
{
 printf("Range of Char %dn", CHAR_BIT);
 printf("Range of Char Max %dn", CHAR_MAX);
 printf("Range of Char Min %dn", CHAR_MIN);
 printf("Range of int min %dn", INT_MIN);
 printf("Range of int max %dn", INT_MAX);
 printf("Range of long min %ldn", LONG_MIN);       
 printf("Range of long max %ldn", LONG_MAX);       
 printf("Range of short min %dn", SHRT_MIN);
 printf("Range of short max %dn", SHRT_MAX);
 printf("Range of unsigned char %un", UCHAR_MAX);  
 printf("Range of unsigned long %lun", ULONG_MAX); 
 printf("Range of unsigned int %un", UINT_MAX);    
 printf("Range of unsigned short %un", USHRT_MAX);

 return 0;
}

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K & R C Programs Exercise 1-24.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 1-24:
C program for rudimentary syntax errors like unbalanced parentheses, brackets,quotes,and braces. This program is hard if we do it in full generality. K and R C Program Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include <stdio.h>

#define MAXLINE 1000 /* max input line size */
char line[MAXLINE]; /*current input line*/

int getline(void); /* taken from the KnR book. */

int main() {
 int len = 0;
 int t = 0;
 int brace = 0, parenthesis = 0, brack = 0;
 int s_quote = 1, d_quote = 1;

 while ((len = getline()) > 0) {
  t = 0;
  while (t < len) {
   if (line[t] == '{') {
    brace++;
   }
   if (line[t] == '}') {
    brace--;
   }
   if (line[t] == '[') {
    brack++;
   }
   if (line[t] == ']') {
    brack--;
   }
   if (line[t] == '(') {
    parenthesis++;
   }
   if (line[t] == ')') {
    parenthesis--;
   }
   if (line[t] == ''') {
    s_quote *= -1;
   }
   if (line[t] == '"') {
    d_quote *= -1;
   }
   t++;
  }
 }
 if (d_quote != 1)
  printf("Mismatching double quote markn");
 if (s_quote != 1)
  printf("Mismatching single quote markn");
 if (parenthesis != 0)
  printf("Mismatching parenthesisn");
 if (brace != 0)
  printf("Mismatching bracesn");
 if (brack != 0)
  printf("Mismatching bracket markn");
 if (brack == 0 && brace == 0 && parenthesis == 0 && s_quote == 1 && d_quote
   == 1)
  printf("Syntax appears to be correct.n");
 return 0;
}

/* getline function */
int getline(void) {
 int c, i;
 extern char line[];

 for (i = 0; i < MAXLINE - 1 && (c = getchar()) != EOF && c != 'n'; ++i)
  line[i] = c;
 if (c == 'n') {
  line[i] = c;
  ++i;
 }
 line[i] = '';
 return i;

}

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K & R C Programs Exercise 1-23.

Posted on by Sandeepa Nadahalli

K and R C, Solution to Exercise 1-23: C program that removes the all comments from a C Program. K and R C Program. Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include "stdio.h"
void rcomment(int c);
void in_comment(void);
void echo_quote(int c);
main();
{
 int c ,d;
 while((c= getchar()) !=EOF)
  rcomment(c);
 return 0;
}
void rcomment(int c) {
 int d;
 if(c == '/')
  if((d= getchar))=='*')
  in_comment();
  else if(d== '/') {
   putchar(c);
   rcomment(d);
  } else {
   putchar(c);
   putchar(d);
  }
  else if(c=='' || c=='"')
    echo_quote(c);

}
void in_comment() {
 int c, d;
 c = getchar();
 d = getchar();
 while (c!= '*' || d!!='/') {
  c = d;
  d = getchar();
 }
}
void echo_quote(int c) {
 int d;
 putchar(c);
 while ((d = getchar()) != c) {
  putchar(d);
  if (d == '\')
   putchar(getchar());

 }
 putchar(d);
}
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K & R C Programs Exercise 1-22.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 1-22:
 C program that folds the very long lines of input into two or more shorter lines. K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include "stdio.h"

#define MAXSIZE 1000

char line[MAXSIZE];

int get_line(void);


int
main()
{
 int i,strlen;
 int location, spaceholder;
 const int foldlength=70;

 while (( strlen = get_line()) > 0 )
 {
  if( strlen < foldlength )
  {
  }
  else
  {

   i = 0;
   location = 0;
   while(i<strlen)
   {
    if(line[i] == ' ')
     spaceholder = i;

    if(location==foldlength)
    {
     line[spaceholder] = 'n';
     location = 0;
    }
    location++;
    i++;
   }
  }
  printf ( "%s", line);
 }
 return 0;
}


int get_line(void)
{
 int c, i;
 extern char line[];

 for ( i=0;i<MAXSIZE-1 && ( c=getchar()) != EOF && c != 'n'; ++i)
  line[i] = c;
 if(c == 'n')
 {
  line[i] = c;
  ++i;
 }
 line[i] = '';
 return i;

}
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K & R C Programs Exercise 1-21.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 1-21:
C Program to replace string of blanks by the minimum number of tabs and blanks to achieve the same spacing. K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include "stdio.h"
#define TABSIZE 6   /*Tab increment size*/
main() {
 int c, no_blanks, pos, no_tabs;
 no_blanks = 0; /*number of blamks required*/
 no_tabs = 0; /* number of tabs required*/

 for (pos = 1; (c = getchar()) != EOF; ++pos) {
  if (c == ' ') {
   if (pos % TABSIZE != 0)
    ++no_blanks;
   else {
    no_blanks = 0;
    ++no_tabs;
   }
  } else {
   for (; no_tabs > 0; --no_tabs)
    putchar('t');
   if (c == 't')
    no_blanks = 0;
   else
    for (; no_blanks > 0; --no_blanks)
     putchar(' ');
   putchar(c);
   if (c == 'n')
    pos = 0;
   else if (c == 't')
    pos = pos + (TABSIZE - (pos - 1) % TABSIZE);

  }
 }
}

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K & R C Programs Exercise 1-20.

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 1-20:
C Program to replace the tabs by proper number of blanks. K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language . 

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include "stdio.h"
#define TABSIZE 6   /*Tab increment size*/
main()
{
 int c, no_blanks,pos;
 no_blanks = 0;   /*number of blamks required*/
 pos = 1;         /* position of the character*/
 while((c=getchar()) != EOF){
  if(c == 't'){
   no_blanks = TABSIZE-(pos-1)%TABSIZE;
   while(no_blanks>0){

    putchar(' ');
    ++pos;
    --no_blanks;
   }
   else if(c == 'n'){
    putchar(c);
    pos = 1;
   } else {
    putchar(c);
    ++pos;
   }
  }
 }
}

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K & R C Programs Exercise 1-19

Posted on by Sandeepa Nadahalli
K and R C, Solution to Exercise 1-19:
Write a function reverse(str) that reverses the character string str. Use it to write program that reverse thes its input a line at a time. K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include "stdio.h"

#define MAXINLINE 1000 /* maximum input line size */

int get_lines(char line[], int maxline);
void reverse(char str[]);

/* print longest input line */
main() {

 char line[MAXINLINE]; /* current input line */

 while ((get_lines(line, MAXINLINE)) > 0) {

  reverse(line);
  printf("%s", line);

 }

}

/* getline: read a line into s, return length */
int get_lines(char str[], int line) {
 int c, i, j;

 for (i = 0, j = 0; (c = getchar()) != EOF && c != 'n'; ++i) {
  if (i < line - 1) {
   str[j++] = c;
  }
 }
 if (c == 'n') {
  if (i <= line - 1) {
   str[j++] = c;
  }
  ++i;
 }
 str[j] = '';
 return i;
}

/*reverse the string str*/
void reverse(char str[]) {
 int i, j;
 char temp;
 i = 0;
 while (str[i] != '')
  ++i;
 --i;
 if (str[i] != 'n')

  --i;
 j = 0;
 while (j < i) {
  temp = str[j];
  str[j] = str[i];
  str[i] = temp;
  --i;
  ++j;
 }
}

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K & R C Exercise 1-18

Posted on by Sandeepa Nadahalli

K and R C, Solution to Exercise 1-18:
Remove trailing blanks and tabs from each line of input, and to delete entirely blank lines. K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact [email protected]
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include "stdio.h"

#define MAXLINE 1000

int get_lines(char line[], int maxline);
int char remove(char str[]);

main()
{

 char line[MAXINLINE];/* current input line */

 while((get_lines(line,MAXINLINE))>0)
  if(remove(line)> 0)
   printf("%s", line);
 return 0;

}
/*
 remove trailing blanks and tabs from character string str
 */
int remove(char str[])
{
 int i=0;
 while(str[i] !='n')
  ++i;

 --i;

 while(i>=0 && (str[i]==' ' || str[i]=='t'))
  --i;
 if(i>=0)
 {
  ++i;
  s[i]='n';
  ++i;
  s[i]='';

 }
 return i;
}
/* getline: read a line into str, return length */
int get_lines(char str[], int line)
{
 int c, i, j;

 for(i = 0, j = 0; (c = getchar())!=EOF && c != 'n'; ++i)
 {
  if(i < line - 1)
  {
   str[j++] = c;
  }
 }
 if(c == 'n')
 {
  if(i <= line - 1)
  {
   str[j++] = c;
  }
  ++i;
 }
 str[j] = '';
 return i;
}

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