C - Q1 How to swap Low-order byte and high order byte in an integer without using temporary variable ?Q

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Q1 How to swap Low-order byte and high order byte in an integer without using temporary variable ?

Q2 write a program to print numbers from 1 to 100 without using any condition checking ?

Q3 If we develop a project in C,then how can we create an .exe file of it?

Q4 Write a program which accepts a filename as a command like argument and reverse the contents of the file (i.e firs character becomesthe last character of the file and so on)
input: the program takes the file name whose content should be reversed
output: the program reverse the contents of the file

Q how can i call a function ,given its name as string?

Total Answers and Comments: 7

Last Update: February 12, 2007 Asked by: M.srilatha

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December 06, 2006 07:55:53

cpradip

RE: Q1 How to swap Low-order byte and high order byte...

wont this work

i = ((i<<4)&255) | ((i>>4)&255); assuming that the data type of the number to hold is 8 bits and positive integers.

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December 07, 2006 06:42:05

Vijaya kumar V r

RE: Q1 How to swap Low-order byte and high order byte...

Then answer is

i = ( ((i<<8)&0xFFFF) | ((i >>8)&0xFFFF))

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December 08, 2006 10:58:35

ragavendar

RE: Q1 How to swap Low-order byte and high order byte...

i = ( ((i<<8)&0xFFFF) | ((i >>8)&0xFFFF))(i>>8) would screw bigtime if i is a negative number. While right shifting, the vacated bits are not filled with zero but with the sign bit.

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January 10, 2007 02:34:48

pavankishore

Member Since: November 2006 Contribution: 6

RE: Q1 How to swap Low-order byte and high order byte...

#include<stdio.h>

main()

{

int x=24;

x=x%10*10+x/10;

printf("%d",x);

}

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January 31, 2007 02:34:31

malaram

Member Since: January 2007 Contribution: 6

Re:Q1. program to print the numbers from 1 to 100 without using any condition checking

#include#includemain(){static int n=1;print(n);int print(int n){printf("%d",n);}

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January 31, 2007 02:37:06

malaram

Member Since: January 2007 Contribution: 6

RE: Q2.

#include#includemain(){int print(int n){printf("%d",n);n++;}static int n=1;print(n);}

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February 12, 2007 05:00:36

rameshwar83

Member Since: February 2007 Contribution: 5

RE: Q2 how to print number from 1 to 100 without using condition checking ...

As this code have been posted for above problem .........#include#includemain(){int print(int n){printf("%d",n);n++;}static int n=1;print(n);}can anyone plz explain me how this code is working............my email id is rameshwar_pratap@yahoo.com

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