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If you are preparing for a campus recruitment for an IT company it is important to be clear with the basics of these languages well. There would be questions around this, especially if you have mentioned them in your Resume. The information below would be useful for you. While it is a bit in detail, at least knowing clearly a portion of this will be handy. Please do not try to over learn and create an impression to the interviewer that you are trying to be extra smart. I have compiled this for you and hope it will be useful. Be clear with the basics of Object Orientation like Encapsulation, Polymorphism etc.
Java and C
The main difference between Java and C are speed, portability, and object-orientation. Java was created for the purpose of making a language that could be implemented...
Friday, September 23
Wednesday, September 21
Check a Number in parent process and pass result to Child Process
#include<stdio.h>
#include<unistd.h>
main()
{
int fd[2],f,i,num,flag=1;pipe(fd);
f=fork();
if(f>0)
{
printf("PARENT PROCESS..");
printf("\nEnter a number : ");
scanf("%d",&num);
if(num==1)flag=0;for(i=2;i<=(num/2);i++)
if(num%i==0)
{
flag=0;
break;
}
close(fd[0]);
write(fd[1],&flag,sizeof(flag));
}
else if (f==0)
{
printf("\n\nCHILD PROCESS.");close(fd[1]);
read(fd[0],&flag,sizeof(flag));
if(flag==1)printf(" \n\tIt is a prime number..\n");
else printf("\n\t It is not a prime number..\n");
}
...
Monday, September 19
Code to Access GPS in Android Phones
GET !!! SET !! GO..!!!!!!!!
Location Based Services (LBS) have become very popular in past few years after the advent of GPS enabled smartphone devices . In this post, we shall see how a LBS application for Android works.
Simply speaking map navigation is possible in following ways:
Using the GPS device in built in mobile- Easier and precise.
Using the ID of the Cell that the user is currently served by
How to code?
We can give dummy values as GPS co-ordiantes for a location(i.e., Longitude and Latitude) .Another way to emulate location is to including .gpx files. Although it is not...
Saturday, September 17
Print a string without using any semicolon
Write a program to print a string without using any semicolon on the program:
#include<stdio.h>
main()
{
if(printf("Hello.."))
{
}
}
I want to know how this program can modified to print any string accepted through Keyboard..!!
If anyone know, feel free to comment it here..!! :):)...
Letter Pattern
Write a program to print the following
A
B B
CC CC
DDD DDD
#include<stdio.h>
main()
{
int i,j,n;
printf("Enter Limit.. : ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
for(j=0;j<(n-i);j++)
printf(" ");
if(i==0)putchar(65);
for(j=0;j<i;j++)putchar(65+i); printf(" ");
for(j=0;j<i;j++)putchar(65+i);
...
C program to print a Number pattern
Write a program to print the following pattern:
0
1 1
2 3 5
8 13 21 34
Hi buddy, Jst analyse the no.s in order, 0,1,1,2,3,5,8,13,21,34....
Yess!!!! this is a Fibonacci series.
0+1=1
1+1=2
1+2=3
2+3=5... and so on
Next requirement is to generate pattern. First line has 1 element, second line has 2 elements and so on. And total number of elements in whole pattern will be N*(N+1)/2 , if there are N number of lines.
#include<stdio.h>
main()
{
int n,i,j,k=0;
int a[20];
printf("Enter the lmit..: ");
scanf("%d",&n);
a[0]=0;
a[1]=1;
...
C program to Print a number table
Write a program to display the following format:
Nosum
11
23
36
410
515
Logic:
First column contains natural numbers serially..
second column contains ( Current first column element+ previous second column element)
2+1=3
3+3=6
4+6=10
5+10=15
#include<stdio.h>
main()
{
int j=0,z,i,n;
printf("Enter the Limit... : ");
scanf("%d",&n);
printf("\n----------------\n
printf("no\tsum");
printf("\n------------------\n");
for(i=1;i<=n;i++)
{
printf("\n%d",i);
j+=i;
...
Reverse words in a string using Recursion
Write a program to perform the following to any input string:
Input : Structure is a derived datatype
output: erutcurtS si a devired epytatad
My Code:
#include<stdio.h>
#include<string.h>
int main()
{
char line[20],word[10];
int i,j=0,len;
printf("Entera string : ");
gets(line);
len=strlen(line);
for(i=0;i<len;i++)
{
while(line[i]!=' '&&i<len)
word[j++]=line[i++];
for(j--;j>=0;j--)
printf("%c",word[j]);
printf(" ");
...
C program to find Size of a structure without using sizeof() operator
Write a program to find the size of following structure without using size of operator
struct ABC
{
int a;
float b;
char c;
};
Hai Viewer, confused?? Hmm.. calculating the size of a datatype without using sizeof() operator seems to be weird. But pointers will help you to solve this problem. First u have to initialize a null pointer on intended datatype .You know that in 'structure ' separate memory will be allocated to each element. So, on incrementing that pointer variable, the value of that pointer will be incremented by size of that structure . That is our Goal..!!!! :)
Since we have initialized pointer with 0 we simply need to print the current pointer value..!!
solution
#include<stdio.h>
struct ABC
{
int...
C program to Print a Non-Fibonacci series
Write a C program to generate non-fibonacci series to given Limit:
#include<stdio.h>
#include<conio.h>
main()
{
int n,a,b,c,d,x;
a=0;
b=1;
c=0;
printf("Enter the upper range of the series:");
scanf("%d",&n);
while(c<=n)
{
c=a+b;
a=b;
b=c;
d=a+b;
for(x=c+1;x<d;x++)
{
if(x<=n)
printf("%d",x);
else
break;
}
}
getch();
}
I hope this code was useful for u!!
Have a better program for ths prblm??
Feel free to comment it here..!! :):)...
C program to Reverse a string using recursion
Write a program to reverse any string using recursion (Maximum 15 steps)
Eg: Input : Bjarne Stroustrup developed C++
Output : ++C depoleved purtsuortS enrajB
This is one of the common question asked in technical contests and interviews.!! it checks ur knowledge about recursion and string. We recursively calls itself until encountering endl character. This fragment plays the vital role:
{
if (current character != endl) process( next caharacter);
print(current character);
}
My code:
#include<stdio.h>
char line[20];
void print(int i)
{
...
Coding Contest- Matrix multiplication
PROBLEM : Write a program to multiply two 3 x 3 matrices where resulting matrix should produce
If cell element is even '0'
If cell element is odd '1'
eg: If resulting matrix of multiplication is
My code:
#include<stdio.h>
main()
{
int a[3][3],b[3][3],c[3][3],d[3][3];
int i,j,k;
printf("Enter First matrix:...\n");
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%d",&a[i][j]);
printf("Enter Second matrix:...\n");
...
Friday, September 9
LEX Program to identify Keywords and convert it into uppercase
Guys, apply simple logic. Detect all keywords( This program deal with a small number of keywods for sake of simplicity).
On detecting any keyword in C, convert it into uppercasr letter using the funtion 'toupper' . Game over!!
%{#include<stdio.h>
int i;
%}keyword main|int|scanf|printf|if|else
%%
{keyword} {
for(i=0;i<yyleng;i++)
printf("%c",toupper(yytext[i]));
}
%%
main()
{
yyin=fopen("num.c","r");
yylex();
}
int yywrap()
{
return 1;
}
OutputLet num.c contains following program fragment.
main()
{
int num;
scanf("%d",&num);
if(num%2)printf("Odd");
else printf("Even")
}
The output will be,
MAIN()
{
INT num;
SCANF("%d",&num);
IF(num%2)PRINTF("Odd");
ELSE...
LEX Program to eliminate all whitespaces
Hi Guys,
This lex program is aimed to eliminate all whitespaces from an input file. As u think, this is not at all a difficult job. We have to simply detect single blank ' ' or tab '\t' or a newline '\n' and delete them in output. That's all..!!!!
%{
#include<stdio.h>
%}
%%
[\n\t ' '] {};
%%
main()
{
yyin=fopen("myfile.txt","r");
yylex();
}
int yywrap()
{
return 1;
}
____________________________________________________________________
Look @ the example:
Basic datatypes in C are:
int char float double
output will be
BasicdatatypesinCare:intcharfloatdouble
...
LEX Program to delete all comments
No Comments :)
This lex program is intended to eliminate comments from a C program. This task is simple since in a C program, comments will be associated only with '//' or '/*...*/ only. So our aim is to detect the occurence of these characters and ignore subsequent comments.
%{
#include<stdio.h>
%}
%%
\/\/.* ;
\/\*(.*\n)*.*\*\/ ;
%%
main()
{
yyin=fopen("mypgm.c","r");
yylex();
}
int yywrap()
{
return 1;
}
\/\/.* ; eliminates single line coments. i.e., comments of the form ' //comment.. .. .. ;'
It simply look on '/'immediately followed by another '/' and ignore that line.
\/\*(.*\n)*.*\*\/ ; eliminates multiple...
LEX Program to count the number of lines, words and letters
Howdy guys,
Lets have a look on how a Lex programs works using a simple example.
This sample programs counts the number of lines, words and characters in a text file.
Lex programming is not rocket science. You have to just apply an eight year old kid's logic. Yes, you read right. Only a school kid's logic.
LOGIC
Read each character from the text file :
Is it a capital letter in English? [A-Z] : increment capital letter count by 1.
Is it a small letter in English? [a-z] : increment small letter count by 1
Is it [0-9]? increment digit count by 1.
All other characters (like '!', '@','&') are counted as special characters
How...
Thursday, September 1
HOW TO INSTALL MATLAB in Windows 7 ???
MatLab is a software by which you can write nice little programs and produce pretty pictures and graphs!! It has already inbult functions based on C,C++ and Java etc. We can directly use them or we can develop our own. This language contain programming, graphical used interface, simulink and Animations,coming to electronics ...u have signal procesing, image processing, communications and other related topics directly in the MATLAB.
In this post, let us have a look on how to install MatLab in Windows 7 !!
Installation of Matlab requires two sections, one activation...
