Tuesday, September 16, 2014

Program to print fibonacci series in C





#include <stdio.h>
int main()
{
    int number,i, f1=0, f2=1, f3=0;
    printf("Enter the number: ");
    scanf("%d", &number);
    printf("The following Series is: ");
    for(i=1;i<=number;i++)
    {
  printf("\n %d", f3);
  f1=f2;
  f2=f3;
  f3=f1+f2;
  
 }
 return 0;
}

Output
Enter the number: 5
The following Series is:
1
1
2
3
5

Fibonacci Series using Recursion



#include<stdio.h>

void printFibonacci(int);

int main(){

    int n;
    

    printf("Enter the range of the Fibonacci series: ");
    scanf("%d",&n);

    printf("Fibonacci Series: ");
    printf("%d %d ",0,1);
    printFibonacci(n);

    return 0;
}

void printFibonacci(int n){

    static long int first=0,second=1,sum;

    if(n>0){
         sum = first + second;
         first = second;
         second = sum;
         printf("%ld ",sum);
         printFibonacci(n-1);
    }

}

Output
Enter the range of the Fibonacci series: 5
Fibonacci Series: 0 1 1 2 3 5 8




Program to find a factorial of a given number in C






#include <stdio.h>
int main()
{
    int fact=1, number,i;
    printf("Enter the number: ");
    scanf("%d", &number);
    
    for(i=1;i<=number;i++)
    {
  fact = fact * i;
  
 }
 
 printf("The Factorial of %d is %d", number, fact);
 return 0;
}

Output

Enter the number: 6
The factorial of 6 is 720


Factorial using Recursion




#include <stdio.h>
int fact = 1;
int factorial(int num)
{
 if (num == 0)
 {
  return fact;
 }
 else
 {
  fact = num * factorial(num-1);
 }
 return fact;
 
 }
int main()
{
 int number;
 printf("Enter the number to find factorial: ");
 scanf("%d",&number);
 number = factorial(number);
 printf("The Factorial is : %d", number);
 return 0;
}

Output
Enter the number to find factorial: 6
The factorial is : 720





-->

Tuesday, September 2, 2014

Program to find Sum of Even and Odd terms in the range in C







 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
#include <stdio.h>
int main()
{
    int i=0,range,odd_sum=0, even_sum=0;
    printf("Enter the range for odd and even nos sum: ");
    scanf("%d", &range);
    for(i=1;i<=range;i++)
    {
        if(i%2 == 0)
        {
            even_sum = even_sum + i;
        }
        else if(i%2 == 1)
        {
            odd_sum = odd_sum + i;
        }
        else
        {
            printf("May be 0");
        }
    }
    printf("\nEven Sum: %d", even_sum);
    printf("\nOdd Sum: %d", odd_sum);
    return 0;

}

Output

Enter the range for odd and even nos sum: 10
Even Sum: 30
Odd Sum: 25

Now the same work can be done using the recursion , Here sum_all is a recursive function that is doing the required work of summing odd numerals and even numerals separately.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
/* using recursion */
#include <stdio.h>
int sum_all(int range, int even_sum, int odd_sum)
{
    if(range == 0)
    {
        printf("\nEven Sum: %d", even_sum);
        printf("\nOdd Sum: %d", odd_sum);
        return 0;
    }
    else
    {
        if(range % 2 == 0)
        {
            even_sum= even_sum + range;
        }
        else if(range % 2 == 1)
        {
            odd_sum =  odd_sum + range;
        }
        else
        {
            printf("Invalid Operation");
        }
        sum_all(range - 1, even_sum, odd_sum);
    }
    return 0;
}
int main()
{
    int i=0,range,odd_sum=0, even_sum=0;
    printf("Enter the range for odd and even nos sum: ");
    scanf("%d", &range);
    i = sum_all(range, even_sum, odd_sum);
    printf("\nEven Sum: %d", even_sum);
    printf("\nOdd Sum: %d", odd_sum);
    return 0;

}

Output

Enter the range for odd and even nos sum: 10
Even Sum: 30
Odd Sum: 25






Wednesday, August 20, 2014

Different C programs to find the biggest of the 3 numbers




Biggest of the three behaviour can be achieved using nested if-else statement as shown below

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
#include <stdio.h>
int main()
{
    int a,b,c;
    printf("Enter Three numbers: ");
    scanf("%d%d%d", &a, &b, &c);

    if(a>b)
    {
        if(a>c)
        {
            printf("A = %d is greatest",a);
        }
    }
    else if(b>a)
    {
        if(b>c)
        {
            printf("B = %d is greatest", b);
        }

    }
    else if(c>a)
    {
        if(c>b)
        {
            printf("C = %d is greatest", c);

        }

    }
    else if(a==b)
    {
        if(a==c)
        {
            printf("A = %d , B = %d and C = %d are equal", a,b,c);
        }

    }
    else
    {
        printf("Something else:");
   
    }

    return 0;
}

Output

Enter Three numbers: 12
76
23
B = 76 is greatest

Enter Three numbers: 12
12
12
A = 12 , B = 12 and C = 12 are equal

Enter Three numbers: 1
0
0
A = 1 is greatest

Biggest of the three using logical (&&) operator




 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
#include <stdio.h>
int main()
{
    int a, b, c;
    printf("Enter three numbers: ");
    scanf("%d%d%d", &a,&b,&c);
    if ((a>b) && (a>c))
    {
        printf("A = %d is greatest", a);
    }
    else if ((b>a) && (b>c))
    {
        printf("B = %d is greatest", b);
    }
    else if ((c>a) && (c>b))
    {
        printf("C = %d is greatest", c);
    }
    else
    {
        printf("All are equal");
    }
    return 0;
}

Output

Enter three numbers: 12
23
34
C = 34 is greatest

Enter three numbers: 54
2
43
A = 54 is greatest

Enter three numbers: 1
1
1
All are equal







Monday, August 18, 2014

C program to check the given number is positive or negative





 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
#include <stdio.h>
int main()
{
    int num;
    printf("Enter any number to check whether it is positive or negative: ");
    scanf("%d", &num);
    if (num == 0)
    {
        printf("The number is %d \n", num);
    }
    
    if (num < 0)
    {
        printf("The number %d is negative \n", num);
    }
    else
    {
        printf("The number %d is positive", num);
    }
    return 0;

}

Output

Enter any number to check whether it is positive or negative: 1
The number 1 is positive

Enter any number to check whether it is positive or negative: -10
The number -10 is negative

Enter any number to check whether it is positive or negative: 0
The number is 0

Using Conditional/Ternary Operators


 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
#include <stdio.h>
int main()
{
    int num;
    printf("Enter any number to check whether it is positive or negative: ");
    scanf("%d", &num);
    if (num == 0)
    {
        printf("The number is %d", num);
    }
    (num < 0 ) ? printf("The number %d is negative \n", num) : printf("The number %d is positive \n", num);
    return 0;

}

Output

Enter any number to check whether it is positive or negative: 1
The number 1 is positive

Enter any number to check whether it is positive or negative: -10
The number -10 is negative

Enter any number to check whether it is positive or negative: 0
The number is 0



Monday, August 4, 2014

C program to check a given number is odd or even





 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
#include <stdio.h>
int main()
{
    int number;
    printf("Enter the number to find even or odd: ");
    scanf("%d", &number);
    if(number % 2 == 0)
    {
        printf("The number %d is even",number);
    }
    else
    {
        printf("The number %d is odd",number);
    }
    return 0;
}

Output

Enter the number to find even or not: 4
The number 4 is even

or

Enter the number to find even or not 5
The number 5 is odd


Using Conditional/Ternary Operator program can be re written as:


1
2
3
4
5
6
7
8
9
#include <stdio.h>
int main()
{
    int number;
    printf("Enter the number to find even or odd: ");
    scanf("%d", &number);
    (number % 2 == 0) ? printf("The number %d is even \n", number) : printf("The number %d is odd \n", number);
    return 0;
}

Output

Enter the number to find even or not: 4
The number 4 is even

or

Enter the number to find even or not 5
The number 5 is odd

Tuesday, July 8, 2014

Operator Precedence in Arithmetic and Comments in C programming



Hierarchy of Operations: The computer scans an expression from left to right and performs only one operation at a time. The order in which various operations are performed is referred to hierarchy of operations

Order of evaluation
Arithmetic Operators
1
*,/,%
2
+ -


  1. Library function used in the expression are executed before the precedence is executed.
  2. Parenthesis may be used to overcome the precednce order. When parenthesis are used , one written on the left side will be executed first. E.g (a+b) - (a-b) , so (a+b) will be executed first
  3. When nested parenthesis are used, the innermost parenthesis will be executed first. 
e.g ((a+b) * c) so here (a+b) will be executed first.

Have a look at this video for more information