C program to print 'xay' in place of every 'a' in a string.

This question was asked in one the technical interview( Under graduate level). This is kind of application for  'replace' feature. You can make it more accurate by putting more constraints. Ans : #include<stdio.h>int main(){int i=0;char str[100],x ='x',y='y' ;printf("Enter the string\n:");gets(str);while(str[i]!='\0'){if(str[i]=='a'){printf("%c ",x);printf("%c ",str[i++] );printf("%c ",y);}else{printf("%c...

How to deallocate dynamically allocate memory without using “free()” function.

NOTE: this is actually puzzle type question nobody  use it realloc() function to free the memory. But I heard, in many interviews this question had been asked. Standard library function realloc() can be used to deallocate previously allocated memory. Below is function declaration of “realloc()” from “stdlib.h” void *realloc(void *ptr, size_t size);   If “size” is zero, then...

SCANF() - Some important features.

scanf() The scanf()is very powerful function. We can use it to scan the input but we can add something in it's arguments and make it very powerful function. Assume that we have one variable : a[100]; To read a string:  scanf("%[^\n]\n", a); // it means read until you...

Why should u not use turbo c++ ?

I have seen that in many under graduate collages turbo c++ is still used.  But now a days it is an outdated IDE.  Please, do not use it. It is totally useless. Turbo C++ There are many recent IDEs available which has great features and no bugs like GCC or Eclipse C/C++. Now a days...

Why C treats array parameters as pointers?

In C we can see that array parameters are generally treated as pointers. See the following definitions of two functions: void function1(int arr[]) {   /* Silly but valid. Just changes the local pointer */   arr = NULL; } void function2(int *arr) {   /*...

Voice Search On Google

    Search by speaking. - You can now say things like "pictures of …" or "where is …?" - Fixed browser button in latest versions of Chrome. Voice Search provides a method to search by speaking. For example, just click on the microphone and say "kittens" to search for kittens. If you specifically want pictures of kittens, say "google images kittens". Want to learn more about World...

HOW TO LOG OUT YOUR FACEBOOK ACCOUNT FROM OTHER COMPUTERS?

Facebook We use to go cyber cafe or any other place and open facebook or from friend's mobile  and  sometimes we forgot to log out but now  don't need to be worry about it,there is a option to log out your account from every computer.....follow the steps... 1. log in your account...

Different Technologies & Their Founders

If any mistake, inform me ...plz... 1. Google: Larry Page & Sergey Brin 2. Facebook: Mark Zuckerberg 3. Yahoo: David Filo & Jerry Yang 4. Twitter: Jack Dorsey & Dick Costolo 5. Internet: Tim Berners Lee 6. Linkdin: Reid Hoffman, Allen Blue & Koonstantin Guericke 7. Email: Shiva Ayyadurai 8. Gtalk: Richard Wah kan 9. Whats up: Laurel Kirtz 10. Hotmail: Sabeer Bhatia 11. Orkut: Buyukkokten...

DIFFERENCE BETWEEN CORE I3, CORE I5, CORE I7...??

-> Core i3: * Entry level processor. * 2-4 Cores * 4 Threads * Hyper-Threading ­ (efficient use of processor resources) * 3-4 MB Cache * 32 nm Silicon (less heat and energy) -> Core i5: * Mid range processor. * 2-4 Cores * 4 Threads * Turbo Mode (turn off core if not used) * Hyper-Threading ­ (efficient use of processor resources) * 3-8 MB Cache * 32-45 nm Silicon (less heat and energy) ...

C program to print a semicolon without using a semicolon anywhere in the code.

Generally when use printf("") statement we have to use semicolon at the end.If we want to print a semicolon, we use the statement: printf(";" );In above statement, we are using two semicolons . The task of printing a semicolon without using semicolon anywhere in the code can be accomplish ed by using the ascii value of';'which is equal to 59.Program: Program to print a semicolon without using semicolon...

C programs that print hello word without using semicolon

It is easy to run a program that prints hello world without using a semicolon. Here some solutions are given. try new if possible.<Yahh..!! this is for B.Tech guys..!!>...................................................... Solution: 1  #include<stdio.h> void main(){     if(printf("Hello world")){     } } Solution: 2 #include<stdio.h> void...

How to find median in order of log n ?

Median in an infinite series of integers Solution: Use 2 heaps: One MaxHeap and one MinHeap. 1) MaxHeap contains the smallest half of the received integers 2) MinHeap contains the largest half of the received integers The integers in MaxHeap are always less than or equal to the integers in MinHeap. Also, the number of elements in MaxHeap is either equal to or 1 more than the number of elements...

how to turn-off/turn-on firewall in Ubuntu.?

command to turn-off firewall in Ubuntu is : sudo ufw disable command to turn-off firewall in Ubuntu is : sudo ufw enable ...

stack programme using structure in C

#include<stdio.h>#include<stdlib.h>#define structsize 10 struct stack{    int top;    int item[structsize];};void push(struct stack *ps){    int element;    printf("\npush an element:");    scanf("%d",&element);    if(ps->top==(structsize-1)){    printf("overflow\n");   ...

How to find execution time of program in C??

We always eager to know that how much time my program takes to give me output. As a good programmer you always worry about the time complexity. If you print your execution time along with output then you can check your execution time for different test cases. It's really exiting. #include<stdio.h> #include<time.h>int main(){clock_t begin, end;begin = clock();double time_spent; /*    ...

Motherboard

What is a motherboard ?? A motherboard (also known as the mainboard, system board, planar board or logic board) is the main PCB found in computers and other expandable systems. It holds many of the crucial electronic components of the system, such as the CPU, memory, and processor. motherboard The...

How to terminate processes in ubuntu??

In windows we can easily terminate the process by ctrl+alt+del  right click on program name go to process end process. but in Linux , it is not that much easy, u have to follow the terminal steps: example: to close firefox process. Open terminal (ctrl+alt+t) type command : ps auxwww | grep firefox u will get some table , in which u find process IDs type command : kill 2348 (note: 2384...

All android versions and their names

Android 1.5 Cup Cake  Android 1.5 =  Cupcake  Android 1.6 =  Donut  Android 2.0/2.1 =  Eclair  Android 2.2 = Froyo  Android 2.3 = Gingerbread  Android 3.0/3.1/3.2 = Honeycomb  Android 4.0 = Ice Cream Sandwich  Android 4.1/4.2/4.3 = Jelly Bean  Android...

To print indian map in "c" langauge

#include<stdio.h>#include<conio.h> //for windows only void main() { int a,b,c; for (b=c=10;a="- FIGURE?, UMKC,XYZHello Folks,\ TFy!QJu ROo TNn(ROo)SLq SLq ULo+\ UHs UJq TNn*RPn/QPbEWS_JSWQAIJO^\ NBELPeHBFHT}TnALVlBLOFAkHFOuFETp\ HCStHAUFAgcEAelclcn^r^r\\tZvYxXy\ T|S~Pn SPm SOn TNn ULo0ULo#ULo-W\...

Problem : Firefox is responding very late

many of you might facing a problem with  " Firefox web browser" that it responding too late, even input from keyword is also not taking well etc... I got one solution, after doing this my browser responding nicely. Go to tools->add-ones->Extention Remove all your video and Flash plug-ins...

Don't use Free() more than once for same pointer

To use Free() more than once cause a "FATAL ERROR" . "FATAL ERROR" cause CRASH the program, and because of which we get a segmentation fault as error... sometime it also make problem when we are doing program in group. one member frees the pointer while actually another fellow is using same pointer. so never try to use Free() more than once for same pointer.  ...

How to install java in ubuntu??

First start your terminal ( if not found on desk top try shortcut key ctrl+alt+T) make sure you are connected to the internet. update your Ubuntu by the command : sudo apt-get update then install java (jdk and jre) by the command : sudo apt-get install openjdk-6-jdk openjdk-6-jre To check if java has been installed in your system, type the following command:javac -version ...

problem: All exe files are opening in vlc

When you try to open any exe file or say shortcuts then it opens in vlc media player that is horrible. I have found some solutions try them .  click here  and fix it.If you are unable to open Internet Explorer to access the link, hit the Windows key plus r on your keyboard and copy and paste the below command in the Open Box (this assumes that W7 is installed on your C drive): rundll32...

why you not recieving any sms from internet sms website???

Aren't you receiving any SMS from various online free daily sms sender or is you phone no more has any notifications of new sms's, that is because of change in the TRAI rule, most of them are not receiving messages from the usual sources where they used to get. The rule was passed to protect consumer privacy from SMS spammers.You must be shocked to see such kind of errors even while...

Why bother to learn "C language" Today??

Now a days there  are many superior languages are available like C++, java, C# etc, then why to learn C??? There are several reasons for this , as follows- I believe that nobody can learn such higher languages like C++,java,C# directly because it has things like classes, objects, polymorphism, Exception handling etc..we can learn this complicated components easily when we are comfortable with...

Cryptography

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