C programming examples

C program to count vowels in a string: C programming code to find how many number of vowels are present in a string, For example in the string "c programming" there are three vowels 'o', 'a' and 'i'. In the program both lower and upper case are considered i.e 'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O' and 'U'. In our code we scan the complete string and check every character in it if it's a vowel then counter is incremented by one, consonants and special characters are ignored.

C programming code

#include<stdio.h>
 
int count_vowels(char []);
int check_vowel(char);

Pattern matching in c: C programming code to check if a given string is present in another string, For example the string "programming" is present in "c programming". If the string is present then it's location (i.e. at which position it is present) is printed. We create a function match which receives two character pointers and return the position if matching occurs otherwise returns -1. We are implementing naive string search algorithm in our c program

C programming code

#include <stdio.h>
#include <string.h>
 
int match(char [], char []);
 
int main() {

Stack program in c: C program to implement stack using array.

C programming code

#include<stdio.h>
#include<stdlib.h>
 
#define MAX_SIZE 5
 
int stack[MAX_SIZE];
void push();
int pop();
void traverse();
int is_empty();
int top_element();
int top = -1;
 
main()
{
   int element, choice;
 
   while(1)
   {
      printf("Stack Operations.\n");
      printf("1. Insert into stack (Push operation).\n");
      printf("2. Delete from stack (Pop operation).\n");
      printf("3. Print top element of stack.\n");
      printf("4. Check if stack is empty.\n");

c program to find nCr and nPr: This code calculate nCr which is n!/(r!*(n-r)!) and nPr = n!/(n-r)!

C program to find nCr using function

#include<stdio.h>
 
long factorial(int);
long find_ncr(int, int);
long find_npr(int, int);
 
main()
{
   int n, r;
   long ncr, npr;
 
   printf("Enter the value of n and r\n");
   scanf("%d%d",&n,&r);
 
   ncr = find_ncr(n, r);
   npr = find_npr(n, r);
 
   printf("%dC%d = %ld\n", n, r, ncr);
   printf("%dP%d = %ld\n", n, r, npr);
 
   return 0;
}
 
long find_ncr(int n, int r)
{
   long result;
 

c program to delete duplicate elements in an array

C programming code

#include<stdio.h>
 
main()
{
   int n, a[10], b[10], count = 0, c, d;
 
   printf("Enter number of elements in array\n");
   scanf("%d",&n);
 
   printf("Enter %d integers\n", n);
   for(c=0;c<n;c++)
      scanf("%d",&a[c]);
 
   for(c=0;c<n;c++)
   {
      for(d=0;d<count;d++)
      {
         if(a[c]==b[d])
            break;
      }
      if(d==count)
      {
         b[count] = a[c];
         count++;
      }
   }
 

C program for binary search: This code implements binary search in c language. It can only be used for sorted arrays, but it's fast as compared to linear search. If you wish to use binary search on an array which is not sorted then you must sort it using some sorting technique say merge sort and then use binary search algorithm to find the desired element in the list. If the element to be searched is found then its position is printed.

C programming code for binary search

Prime number program in c: c program for prime number, this code prints prime numbers using c programming language. To check whether a number is prime or not see another code below. Prime number logic: a number is prime if it is divisible only by one and itself. Remember two is the only even and also the smallest prime number. First few prime numbers are 2, 3, 5, 7, 11, 13, 17....etc. Prime numbers have many applications in computer science and mathematics. A number greater than one can be factorized into prime numbers, For example 540 = 2²*3³*5¹