Bsc. CSIT

C Program to find prime number

2012-01-05T02:07:00.003-08:00

This program finds all prime numbers from 0 to user defined number. For that it ask a number before giving output.

Example:

#include<stdio.h>
#include<conio.h>
main() {
int a, i, j, z;

   printf("Enter the No.");
   scanf("%d", &a);
   for(i=2; i<a; i++) {
       for(j=2; j<i; j++) {
           z = i%j;
           if(z == 0) {
               j = a;
           }
       }

if(i == 2)

              printf("%d\n", i);
       if(z != 0)
           printf("%d\n", i);
   }
}

Output

Input: 10

Output: 2, 3, 5 7

How it works

First it ask for the input and it runs first loop up to given number. In second loop it divides the previous loop number (i.e. "i") by current number (i.e. "j") and checks if has remainder. If it finds 0 as remainder then it immediately terminates the second loop and continues first one. But if seconds loop ends with no 0 output then it marks as prime number and gives at output.

C Program to display multiplication table by user defined

2011-12-15T00:59:00.003-08:00

This program shows the multiplication of any user defined number.

#include<stdio.h>
#include<conio.h>
main() {

int n, i ,b = 0;
printf("Enter Number: ");

scanf("%d",&n);

for(i=1; i <= 10; i++) {

b = n*i;

printf("%d X %d = %d\n", n, i, b);

}

Output:

If input by user is 5

5 X 1 = 5
5 X 2 = 10
5 X 3 = 25
5 X 4 = 20
5 X 5 = 25
5 X 6 = 30
5 X 7 = 35
5 X 8 = 40
5 X 9 = 45
5 X 10 = 50

It runs a loop from 1 to 10 and multiplies with user provided input and gives output as above format.

C Program to display sum of square up to 10

2011-12-15T00:45:00.004-08:00

This is a simple java code that shows the sum of square of all digit from 1 to 10. You can run this program and check the output on any C platform.

Example:

#include<stdio.h>
#include<conio.h>
main() {
   int i, sq = 0;
   for(i=1 ;i <= 10; i++){
       sq+=i*i;
   }
   printf("sum of square = %d\n",sq);
}

Output:

sum of square = 385

How it works

It runs in following sequence to give the output:

1^2 + 2^2 + .... + 9^2 + 10^2 = 385

C Program to display odd Number up to 30

2011-12-15T00:39:00.002-08:00

Displays all odd number from 1 to 30.

#include<stdio.h>
#include<conio.h>
main() {

int i;

for(i=1; i<=30; i+=2) {

printf("%d\n",i);

}
}

Output:
1
3
.
.
.
27
29

How it works

Runs by adding 2 on each loop which skips even digits.

1 + 2 = 3

3 + 2 = 5

...

27 + 2 = 29

As we need result up to 30, it will only shows output of odd numbers.

C Program to display Number from 1 to 10

2011-12-15T00:36:00.003-08:00

Display all numbers between 1 to 10

#include<stdio.h>
#include<conio.h>
main() {

int i;

for(i=1;i<=10;i++) {

printf("%d\n",i);
}
}

Output:
1
2
3
4
5
6
7
8
9
10

How it works

Runs a loop from 1 to 10 by adding 1 on each current loop value.

Example:

1+1 = 2

2 + 1 = 3

....

9 + 1 = 10

C Program to display Grade

2011-12-09T03:24:00.002-08:00

This Program to display Grade C less than 30, Grade B less than 40 and Grade A less than 50

#include<stdio.h>

main() {

int a;

printf("Enter the Number: \t");

scanf("%d",&a);

if(a < 30)

printf("Grade C\n",a);

else if(a < 40)

printf("Grade B\n");

else if(a <= 50)

printf("Grade A\n");

else

printf("The Enter Number is more than 50\n");

}

Output

Enter the No. 35

Grade B

How it works

When user enters the input it checks if it is less than 30 or not. If yes then it prints Grade C. Similarly if its value is greater than that, then it prints Grade B or Grade A. But it shows invalid value if entered value is greater than 50.

C Program to calculate two number is even or odd

2011-12-02T16:51:00.002-08:00

This program calculates whether the given two inputs sum is odd or even

#include<stdio.h>
#include<math.h>

main() {

int a,b,sum;

printf("Enter 1st no");

scanf("%d",&a);

printf("Enter 2 nd no");

scanf("%d",&b);

s=(a+b)%2;

if(s==0) {

printf("Even \n");

} else {

printf("Odd \n");

}

getch();

}

Output:--
Enter 1st no 11
Enter 2nd no 20
Odd

How it works

It asks for two inputs, then it add those two numbers and then divides the sum by 2. If its remainder is 0 then it shows output as Even else shows Odd.

C Program to find leap year or not

2011-12-02T01:18:00.002-08:00

This program to finds whether the given year is leap year or not

#include<stdio.h>

#include<math.h>

main() {

int year, b;

printf("Enter the year\t");

scanf("%d", &year);

b = year % 4;

if(b == 0) {

printf("the given year %d is leap year\n", year);

} else {

printf("the given year %d is not leap year\n", year);

}

Output:--
Enter the year 2021
the given year 2011 is not leap year

How it works

It finds whether the input year is divisible by 4 or not. If it remainder is 0 then it treats as a leap year and shows this year is leap year else shows given year is not leap year.

C Program to calculate perimeter and area of triangle with 3 sides

2011-12-01T07:59:00.003-08:00

This programs find the perimeter and area of triangle by asking 3 sides length values

#include <stdio.h>

#include <math.h>

int main () {

float a, b, c, s, peri, area;

printf ("Enter the 1st side:");

scanf ("%f", &a);

printf ("Enter the 2nd side:");

scanf ("%f", &b);

printf ("Enter the 3rd side:");

scanf ("%f", &c);

peri = a + b + c;

s = peri / 2;

area = (s * (s - a) * (s - b) * (s - c)) pow (1 / 2);

or sqrt (s * (s - a) * (s - b) * (s - c));

printf ("The perimeter of triangle is:%f\n", peri);

printf ("The area of triangle is:%f\n", area);

}

Output:

Enter 1st side: 4.0

Enter 2nd side: 5.0

Enter 3rd side: 6.0

The perimeter of triangle is: 15.0

The area of triangle is: 9.9

How it works

It asks for 3 sides length values and calculate area and perimeter of triangle with math formula.

C Program to calculate area of triangle having base and height

2011-12-01T07:40:00.001-08:00

Calculate area of triangle

#include <stdio.h>

#include <math.h>

main ()

{

float b, h, a;

printf ("Enter the Base of triangle:");

scanf ("%f", &b);

printf ("Enter the Height of triangle:");

scanf ("%f", &h);

a = b * h / 2;

printf ("The area of Triangle is:%f\n", a);

getch ();

}

Output:

Enter the Base of triangle: 5

Enter the Height of triangle: 6

The area of Triangle is: 15

How it works

Asks for two sides value of triangle and calculate it area.

C Program to Calculate perimeter and area of circle

2011-12-01T04:11:00.001-08:00

This program calculates the perimeter and area of circle

#include <stdio.h>

#include <math.h>

main ()

{

float r, p, a;

printf ("Enter the radius of Circle:");

scanf ("%f", &r);

p = 2 * 3.14 * r;

a = 3.14 * r * r;

printf ("The perimeter of circle is:%f\n", p);

printf ("The area of circle is:%f\n", a);

getch();

}

Output:--

Enter the radius of Circle: 2.5

The perimeter of circle is: 15.7

The area of circle is: 19.6

How it works

It asks for the radius of circle and calculates the perimeter and area of a circle by using circle formula

C Program to convert centigrade into Fahrenheit and Kelvin

2011-12-01T03:45:00.001-08:00

This program ask input in degree celsius and gives output in fahrenheit and Kelvin

#include <stdio.h>

#include <math.h>

main () {

float c, fe, k;

printf ("Enter the temperature in Degree Celsius:");

scanf ("%f", &c);

fe = 1.8 * c + 32;

k = 273 + c;

printf ("The temperature in Fahrenheit is:%f\n", fe);

printf ("The temperature in Kelvin is:%f\n", k);

getch ();

}

Output::---

Enter the temperature in Degree Celsius: 20.0

The temperature in Fahrenheit is: 68.0

The temperature in Kelvin is: 293.0

How it works

After getting value in degree celsius, it calculate Fahrenheit and Kelvin by using conversion formula shown in the above program.

C Program to Calculate Simple Interest

2011-12-01T03:33:00.001-08:00

Program to calculate total interest value with principal amount, rate and time in year.

#include <stdio.h>

#include <math.h>

main ()

{

float p, t, r, si;

printf ("Enter Principal:");

scanf ("%f", &p);

printf ("Enter Rate:");

scanf ("%f", &r);

printf ("Enter Time:");

scanf ("%f", &t);

si = p * t * r / 100;

printf ("The Simple Intrest is:%f\n", si);

getch ();

}

Output:--

Enter Principal: 15000.0

Enter Rate: 25.0

Enter Time: 2.5

The Simple Interest is: 9375.0

How it works

It asks for principal amount, rate of interest and total time in year. Then it calculates the interest by using simple interest formula and gives total interest to be paid at the end.

C Program to find odd or even

2011-12-01T03:05:00.001-08:00

This program shows given number is odd or even.

#include <stdio.h>

#include <math.h>

main () {

int a, b;

printf ("Enter the Number:");

scanf ("%d", &a);

b = a % 2;

if (b == 0)

{

printf ("The given Number %d is even\n", a);

}

else

{

printf ("The given Number %d is odd\n", a);

}

getch();

}

Output::--

Enter the Number: 20

The given Number 20 is even

How it works

After getting input, it divides the number by 2 and check if its remainder is 0 or not. If 0 then it shows as even else odd

C Program to sum 2 numbers...

2011-12-01T02:58:00.002-08:00

Get sum of two number

#include <stdio.h>

#include <math.h>

main ()

{

int a, b, c;

printf ("Enter the value of a & b:");

scanf ("%d%d", &a, &b);

c = a + b;

printf ("sum of the two numbers is:%d\n", c);

getch ();

}

Output:-

Enter the value of a & b: 2 , 3

Sum of the two numbers is: 5

How it works

After getting two numbers, it does sum and prints the total.