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C Articles
Page 33 of 96
Average of odd numbers till a given odd number?
The average of odd numbers till a given odd number is a simple concept. You just need to find odd numbers till that number then take their sum and divide by the number.If average of odd number till n is to be found. Then we will find odd numbers from 1 to n add then divide it by the number of odd number.ExampleAverage of odd number till 9 is 5 i.e.1 + 3 + 5 + 7 + 9 = 25 => 25/5 = 5There are two methods for calculating the average of odd number till n which is an ...
Read MoreAverage of even numbers till a given even number?
To find the average of even numbers till a given even number, we will add all the even number till the given number and t count the number of even numbers. Then divide the sum by the number of even numbers.ExampleAverage of even numbers till 10 is 6 i.e.2 + 4 + 6 + 8 + 10 = 30 => 30/ 5 = 6There are two methods for calculating the average of even number till n which is an even number.Using LoopsUsing FormulaProgram to find the average of even number till n using loopsTo calculate the average of even numbers ...
Read MoreArea of a circle inscribed in a regular hexagon?
The circle inscribed in a regular hexagon has 6 points touching the six sides of the regular hexagon.To find the area of inscribed circle we need to find the radius first. For the regular hexagon the radius is found using the formula, a(√3)/2.Now area of the circle inscribed is 3πa*a/4SampleSide of hexagon − 4Area = 37.68Example Code#include int main(void) { int a = 14; float pie = 3.14; float area = (float)(3*a*a*pie/4); printf("The area of circle inscribed in the hexagon of side %d is %f", a, area); return 0; }OutputThe area of circle inscribed ...
Read MoreArea of a Circular Sector?
A circular sector also known as circle sector / sector of a circle is the portion of the circle that is inscribed by between 2 radii. This area is enclosed between two radii and an arc. To find the area inscribed we need to find the angle that is between the two radii. The total area is equal to 360o of angle. To find the area for an angle we will multiply the area by θ/360. This given the area of section inscrible.Where θ is the angle between the two radii in degree.Area of a sector of a circle = ...
Read MoreArea of circle inscribed within rhombus?
Circle inscribed in a rhombus touches its four side a four ends. The side of rhombus is a tangent to the circle.Here, r is the radius that is to be found using a and, the diagonals whose values are given.Now the area of triangle AOB = ½ * OA * OB = ½ * AB * r (both using formula ½*b*h).½ *a/2*b/2 = ½ *( √ (a2/4 + b2/4))*ra*b/8 = √ (a2+ b2 )*r /4r = a*b/ 2√ (a2+ b2 )Area of circle = π*r*r = π*(a2*b2)/4(a2+ b2 )ExampleThe diagonal of the rhombus 5 & 10.Area is 15.700000Example Code#include ...
Read MoreArea of circle which is inscribed in an equilateral triangle?
The area of a circle inscribed inside an equilateral triangle is found using the mathematical formula πa2/12.Lets see how this formula is derived, Formula to find the radius of the inscribed circle = area of the triangle / semi-perimeter of triangle.Area of triangle of side a = (√3)a2/4Semi-perimeter of triangle of side a = 3a/2According to formula, Radius of circle = (√3)a22/4 / 3a/2 = a/2√3Area of circle = πr2 = πa2/12Example Code#include int main(void) { int a = 5; float pie = 3.14; float area = (float)((pie*a*a)/12); printf("the area of circle inscribed in the ...
Read MoreArea of Circumcircle of a Right Angled Triangle?
The area of circumcircle of a right-angle triangle when the hypotenuse(H) of the triangle is given is found using the formula πH2/4.This formula is derived using the fact that the circumcircle touches all the corners of the triangle, in this case the maximum length between two points in the hypotheses which passes through the center of the circle. This makes the hypotenuse the diameter of the circle.This is why the area of circle which is πd2/4. (d = 2r) replaces the d by H.ExampleHypotenuse = 8Area of circle = 50.26Example Code#include int main(void) { int H = 14; ...
Read MoreA comma operator question in C/C++ ?
Comma Operator in C/C++ programming language has two contexts −As a Separator −As an operator − The comma operator { , } is a binary operator that discards the first expression (after evaluation) and then use the value of the second expression. This operator has the least precedence.Consider the following codes and guess the output −Example#include int main(void) { char ch = 'a', 'b', 'c'; printf("%c", ch); return 0; }OutputIt gives an error because the works as a separator.prog.c: In function ‘main’: prog.c:5:20: error: expected identifier or ‘(’ before 'b' char ch = 'a', 'b', 'c'; ...
Read More“extern” keyword in C
External variables are also known as global variables. These variables are defined outside the function. These variables are available globally throughout the function execution. The value of global variables can be modified by the functions. “extern” keyword is used to declare and define the external variables.Scope − They are not bound by any function. They are everywhere in the program i.e. global.Default value − Default initialized value of global variables are Zero.Lifetime − Till the end of the execution of the program.Here are some important points about extern keyword in C language, External variables can be declared number of times ...
Read More“register” keyword in C
Register variables tell the compiler to store the variable in CPU register instead of memory. Frequently used variables are kept in registers and they have faster accessibility. We can never get the addresses of these variables. “register” keyword is used to declare the register variables.Scope − They are local to the function.Default value − Default initialized value is the garbage value.Lifetime − Till the end of the execution of the block in which it is defined.Here is an example of register variable in C language, Example#include int main() { register char x = 'S'; register int a ...
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