Friday, 29 June 2012
Cprogramming.......
C...
C Programming
What is a programming language?--Human beings
need language to communicate between them. Similarly to communicate with
computers we need a programming language. All the events in life can be
communicated to computers with the help of programming language. C
is the basic of all programming language. Before the introduction of C
we had only Machine level languages. C is just like any other
communication Language.
If you learn C programming thoroughly you can easily learn other programming languages. To learn C
we just need to know the syntax of C program only. i.e order in which
we have to write the contents.This website is intended to introduce C programming
to beginning programmers. Over several years of studying, I have noted a
large number of students appear to have difficulty in grasping the
fundamentals of C Language. So I am trying to explain them with the help
of simple examples.
This website will help you get a quick start with C programming. This website is a guide for the beginners and also for those who have little knowledge on C Programming fundamentals.
There are different types of
programming languages such as Structure oriented, Object oriented etc. C
is the most commonly used Structure oriented programming language.
Compiler for some languages are developed using C only. With the help of
this tutorial I am trying to explain all the basics of C.In order to
successfully complete this tutorial, you won't need any prior knowledge
of the C programming language. First of all I will start with the most
basic concepts and take you up to the highest level of C programming
including the usually intimidating concepts of structures, union,file,
pointers and dynamic memory allocation,etc.
Once you have mastered C, you will find Object Oriented Language such as c++,java, etc are easy to learn.
Definition
of perfect number or What is perfect number?
Perfect
number is a positive number which sum of all positive divisors excluding that
number is equal to that number. For example 6 is perfect number since divisor
of 6 are 1, 2 and 3. Sum of its divisor
is
1 + 2+ 3 =6
Note: 6 is the smallest perfect
number.
Next perfect number is 28 since 1+
2 + 4 + 7 + 14 = 28
Some more perfect numbers: 496,
8128
Code 1:
1. C program to check perfect number
#include<stdio.h>
int main(){
int n,i=1,sum=0;
printf("Enter a number: ");
scanf("%d",&n);
while(i<n){
if(n%i==0)
sum=sum+i;
i++;
}
if(sum==n)
printf("%d is a perfect
number",i);
else
printf("%d is not a perfect
number",i);
return 0;
}
Sample output:
Enter a number: 6
6 is a perfect number
Code 2:
1. C program to find perfect numbers
2. C perfect number code
3. Perfect number program in c language
#include<stdio.h>
int main(){
int n,i,sum;
int min,max;
printf("Enter the minimum range: ");
scanf("%d",&min);
printf("Enter the maximum range: ");
scanf("%d",&max);
printf("Perfect numbers in given range is: ");
for(n=min;n<=max;n++){
i=1;
sum
= 0;
while(i<n){
if(n%i==0)
sum=sum+i;
i++;
}
if(sum==n)
printf("%d ",n);
}
return 0;
}
Sample output:
Enter the minimum range: 1
Enter the maximum range: 20
Perfect numbers in given range
is: 6
Code 3:
3. C program to print perfect numbers from 1 to 100
#include<stdio.h>
int main(){
int n,i,sum;
printf("Perfect numbers are: ");
for(n=1;n<=100;n++){
i=1;
sum
= 0;
while(i<n){
if(n%i==0)
sum=sum+i;
i++;
}
if(sum==n)
printf("%d ",n);
}
return 0;
}
Output:
Perfect numbers are: 6 28
3. Wap to reverse a number in c
#include<stdio.h>
int main(){
int num,r,reverse=0;
printf("Enter any number: ");
scanf("%d",&num);
for(;num!=0;num=num/10){
r=num%10;
reverse=reverse*10+r;
}
printf("Reversed of number: %d",reverse);
return 0;
}
Sample output:
Enter any number: 123
Reversed of number: 321
How to
write power in c
#include<stdio.h>
int main(){
int pow,num,i=1;
long int sum=1;
printf("\nEnter a number: ");
scanf("%d",&num);
printf("\nEnter power: ");
scanf("%d",&pow);
while(i<=pow){
sum=sum*num;
i++;
}
printf("\n%d to the power %d is: %ld",num,pow,sum);
return 0;
}
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