C Program to demonstrate Ternary condition.

C Program to demonstrate the Ternary conditional operator(?). Ternary operator is a short hand combination of the if-else statement. You can use the ternary operator in initialize lists. Read more about C Programming Language .

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#include<stdio.h>
int main()
{
int min,x,y;
printf("Enter two numbersn");
scanf("%d%d",&x,&y);
min=x <= y ? x : y;
/*
The ternary operator (?) can be rewritten using the if-else statement:
if(x<=y)
{
min=x;
}
else
{
min=y;
}*/
printf("n Small number is: %d",min);
return 0;
}
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C Program to find the Inverse of the Matrix.

C Program to find the Inverse of a Matrix. To find the Matrix Inverse, matrix should be a square matrix and Matrix Determinant is should not Equal to Zero. if A is a Square matrix and |A|!=0, then AA’=I (I Means Identity Matrix). Read more about C Programming Language .

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#include<stdio.h>
#include<math.h>
float detrminant(float[][], float);
void cofactors(float[][], float);
void trans(float[][], float[][], float);
main() {
float a[25][25], n, d;
int i, j;
printf("Enter the order of the matrix:n");
scanf("%f", &n);
printf("Enter the elemnts into the matrix:n");
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++) {
scanf("%f", &a[i][j]);
}
}
d = detrminant(a, n);
printf("nTHE DETERMINANT IS=%2f", d);
if (d == 0)
printf("nMATRIX IS NOT INVERSIBLEn");
else
cofactors(a, n);
}

float detrminant(float a[25][25], float k) {
float s = 1, det = 0, b[25][25];
int i, j, m, n, c;
if (k == 1) {
return (a[0][0]);
} else {
det = 0;
for (c = 0; c < k; c++) {
m = 0;
n = 0;
for (i = 0; i < k; i++) {
for (j = 0; j < k; j++) {
b[i][j] = 0;
if (i != 0 && j != c) {
b[m][n] = a[i][j];
if (n < (k - 2))
n++;
else {
n = 0;
m++;
}
}
}
}
det = det + s * (a[0][c] * detrminant(b, k - 1));
s = -1 * s;
}
}
return (det);
}

void cofactors(float num[25][25], float f) {
float b[25][25], fac[25][25];
int p, q, m, n, i, j;
for (q = 0; q < f; q++) {
for (p = 0; p < f; p++) {
m = 0;
n = 0;
for (i = 0; i < f; i++) {
for (j = 0; j < f; j++) {
b[i][j] = 0;
if (i != q && j != p) {
b[m][n] = num[i][j];
if (n < (f - 2))
n++;
else {
n = 0;
m++;
}
}
}
}
fac[q][p] = pow(-1, q + p) * detrminant(b, f - 1);
}
}
trans(num, fac, f);
}

void trans(float num[25][25], float fac[25][25], float r)

{
int i, j;
float b[25][25], inv[25][25], d;
for (i = 0; i < r; i++) {
for (j = 0; j < r; j++) {
b[i][j] = fac[j][i];
}
}

d = detrminant(num, r);
inv[i][j] = 0;
for (i = 0; i < r; i++) {
for (j = 0; j < r; j++) {
inv[i][j] = b[i][j] / d;
}
}

printf("nTHE INVERSE OF THE MATRIX:n");
for (i = 0; i < r; i++) {
for (j = 0; j < r; j++) {
printf("t%2f", inv[i][j]);
}
printf("n");
}
}
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Array search program in C

Very often we encounter a situation where we have to search for a given target value in a list of values. Simple value types like integers are stored in arrays. This program demonstrates how to do a search within an array by using a method called linear search.

Linear search, also called as ‘Sequential search’ is a technique of finding a target value within a list. It sequentially checks each element of the list with target value until a match is found or the list is exhausted. This approach may be very inefficient to be used in practical problem solving. However, this is very easy to understand and implement. You can read more about linear search.

This program implements linear search to search for a given integer key in an integer array. We have many more C programs that deal with arrays. See more Programs on Arrays in C.

The Program

#include <stdio.h>
#include <conio.h>
void main()
{
int array[10];
int i, N, keynum, found=0;
printf("Enter the value of N\n");
scanf("%d",&N);
printf("Enter the elements one by one\n");
for(i=0; i<N ; i++)
{
scanf("%d",&array[i]);
}
printf("Input array is\n");
for(i=0; i<N ; i++)
{
printf("%d\n",array[i]);
}
printf("Enter the element to be searched\n");
scanf("%d", &keynum);
for ( i=0; i < N ; i++)
{
if( keynum == array[i] )
{
found = 1;
break;
}
}
if ( found == 1)
printf("Element found in the given array");
else
printf("Element was not found in the array");
} /* End of main */

Sample Output


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C Program to demonstrate the ‘getchar’ function.

Program to demonstrate the getchar function. The program will read data entered via the keyboard. And returns the number of characters entered. Read more about C Programming Language .

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***********************************************************/

#include <stdio.h>

#define RETURN 'n' /* n == return in UNIX
r == return in DOS */

main()
{
int count=0;
puts("Please enter some text.");
/* Count the letters in the 'stdin'
buffer. */
while ( getchar() != RETURN) count++;

printf("You entered %d charactersn", count);
}
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C Program to check the given number is Armstrong or not?

C Program to check the given number is Armstrong number or not?. Armstrong number is a number that is the sum of its own digits each raised to the power of the number of digits. Example: 153 = 1^3 + 5^3 + 3^3. Read more about C Programming Language .

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***********************************************************/


#include<stdio.h>
void main()
{
int num,num1,arms=0,rem;

printf("Enter the number:n");
scanf("%d",&num);
num1=num;
while(num>0)
{
rem=num%10;
arms=arms+rem*rem*rem;
num=num/10;
}
if(num1==arms)
{
printf(" n%d is an Armstrong number",num1);
}
else
{
printf("n%d is NOT an Armstrong number",num1);
}

}
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C Program to implement the Lagrange interpolation

C Program to implement the Lagrange interpolation. Lagrange interpolation is the polynomial interpolation. It is the process of passing a polynomial of degree n-1 through n points. In this program we used the arrays in c. Read more about C Programming Language .

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*
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***********************************************************/
#include<stdio.h>
#include<conio.h>
#define MaxN 90

void main()
{
float arr_x[MaxN+1], arr_y[MaxN+1], numerator, denominator, x, y=0;
int i, j, n;
clrscr();
printf("Enter the value of n: n");
scanf("%d", &n);
printf("Enter the values of x and y: n");
for(i=0; i<=n; i++)
scanf("%f%f", &arr_x[i], &arr_y[i]);
printf("Enter the value of x at which value of y is to be calculated: ");
scanf("%f", &x);
for (i=0; i<=n; i++)
{
numerator=1;
denominator=1;
for (j=0; j<=n; j++)
if(j!=i)
{
numerator *= x-arr_x[j];
denominator *= arr_x[i]-arr_x[j];
}
y+=(numerator/denominator)*arr_y[i];
}
printf("When x=%4.1f y=%7.1fn",x,y);
getch();
}



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C Program to print Floyd’s triangle

Floyd’s triangle is the right angled triangular array of natural numbers. Here we used the nested For loop to print the Floyd’s triangle.
Read more about C Programming Language .

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***********************************************************/

#include<stdio.h>


int main(){
int i,j,n,k=1;

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

printf("FLOYD'S TRIANGLEnn");
for(i=1;i<=n;i++){
for(j=1;j<=i;j++,k++)
printf(" %d",k);
printf("n");
}

return 0;
}
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C Program to calculate the total execution time of a program.

C Program to calculate the total execution time of a program. Here we used the “time.h” preprocessor. In this program we used the clock_t variables start and end , They starts the time counter and ends the counter. Execution time of a program is useful to calculate the efficiency of the program.
Read more about C Programming Language .

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*
* Happy Coding
***********************************************************/

#include<stdio.h>
#include<time.h>

int main()
{
int i;
double total_time;
clock_t start, end;

start = clock();//time count starts

srand(time(NULL));
for (i = 0; i < 25000; i++)
{
printf("random_number[%d]= %dn", i + 1, rand());
}
end = clock();//time count stops
total_time = ((double) (end - start)) / CLK_TCK;//calulate total time
printf("nTime taken to print 25000 random number is: %f", total_time);
return 0;
}
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C Program to Demonstrate global and internal variables.

C Program to Demonstrate global and internal variables.When variable declared outside the all the blocks, they are called global variables, and they are initialized by the system. Variables declared within the functions are called as internal variables, the are locale to that function, and user only initialize the variable. Read more about C Programming Language .

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#include<stdio.h>

int counter = 0; /* global because we are outside
all blocks. */
int func(void);

main()
{
counter++; /* global because it has not been
declared within this block */
printf("counter is %2d before the call to funcn", counter);

func(); /* call a function. */

printf("counter is %2d after the call to funcn", counter);
}

int func(void)
{
int counter = 10; /* local. */
printf("counter is %2d within funcn", counter);
}
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