Programs using Functions

Author: its-Kumar

3_Functions/Add_without+.c

@@ -0,0 +1,29 @@
+//program for adding two numbers without using + operator
+
+#include <stdio.h>
+
+int Add(int a, int b)
+{
+    int max, min, carry;
+
+    max = (a > b) ? a : b;
+    min = (a > b) ? b : a;
+    while (max != 0)
+    {
+        carry = min & max;
+        min = min ^ max;
+        max = carry << 1;
+    }
+    return min;
+}
+int main(void)
+{
+    int n1, n2;
+
+    printf("Enter any two numbers : ");
+    scanf("%d%d", &n1, &n2);
+
+    printf("%d + %d is = %d", n1, n2, Add(n1, n2));
+
+    return 0;
+}

3_Functions/BaseConvertor.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void convert(int, int);
+void main()
+{
+    int num, base;
+    printf("Enter a positive decimal number:\n");
+    scanf("%d", &num);
+    if (num < 0)
+        exit(0);
+    printf("Enter the Base:\n");
+    scanf("%d", &base);
+    printf("\n %d in %d base is:\n", num, base);
+    convert(num, base);
+}
+void convert(int n, int base)
+{
+    int rem = n % base;
+    if (n == 0)
+        return;
+    convert(n / base, base);
+    if (rem < 10)
+        printf("%d", rem);
+    else
+        printf("%c", rem - 10 + 'A');
+}

3_Functions/Binary.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+long int binary(int);
+int main(void)
+{
+	int num;
+
+	printf("Enter a number : ");
+	scanf("%d", &num);
+	printf("Decimal = %d\nBinary = %ld", num, binary(num));
+	return 0;
+}
+long int binary(int n)
+{
+	long a = 1, bin = 0, rem;
+
+	while (n > 0)
+	{
+		rem = n % 2;
+		bin = bin + rem * a;
+		n /= 2;
+		a *= 10;
+	}
+	return bin;
+}

3_Functions/Checkprime_number.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <math.h>
+
+int isPrime(long int);
+
+int main(void)
+{
+	int num;
+
+	printf("Enter a number : ");
+	scanf("%ld", &num);
+
+	if (isPrime(num))
+		printf("Number is prime..");
+	else
+		printf("Number is not prime..");
+}
+int isPrime(long int n)
+{
+	int i;
+
+	for (i = 2; i < sqrt(n); i++)
+		if (n % i == 0)
+			return 0;
+	return 1;
+}

3_Functions/DivisibleBy9and11.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+
+int divisibleBy9(long int n)
+{
+  int sumofdigits;
+  if (n == 9)
+    return 1;
+  if (n < 9)
+    return 0;
+  sumofdigits = 0;
+  while (n > 0)
+  {
+    sumofdigits += n % 10;
+    n /= 10;
+  }
+  divisibleBy9(sumofdigits);
+}
+int divisibleBy11(long int n)
+{
+  int s1 = 0, s2 = 0, diff;
+  if (n == 0)
+    return 1;
+  if (n < 10)
+    return 0;
+  while (n > 0)
+  {
+    s1 += n % 10;
+    n /= 10;
+    s2 += n % 10;
+    n /= 10;
+  }
+  diff = s1 > s2 ? (s1 - s2) : (s2 - s1);
+  divisibleBy11(diff);
+}
+void main()
+{
+  long int num;
+  printf("Enter any number:\n");
+  scanf("%ld", &num);
+  if (divisibleBy9(num))
+    printf("%ld is Divisible By 9\n", num);
+  if (divisibleBy11(num))
+    printf("%ld is Divisible By 11\n", num);
+  else
+    printf("%d is not Divisible By 9 or 11\n", num);
+}

3_Functions/Even_without%.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+int isEven(int n)
+{
+	if (n & 1)
+		return 0;
+	return 1;
+}
+int main(void)
+{
+	int num;
+
+	printf("Enter any number : ");
+	scanf("%d", &num);
+	if (isEven(num))
+		printf("%d is Even\n", num);
+	else
+		printf("%d is Odd\n", num);
+	return 0;
+}

3_Functions/GCD.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+
+void main()
+{
+	void fun_gcd(unsigned int, unsigned int);
+	unsigned int j, k;
+
+	printf("Enter two numbers:\n");
+	scanf("%u%u", &j, &k);
+	fun_gcd(j, k);
+}
+
+void fun_gcd(unsigned int a, unsigned int b)
+{
+	unsigned int d, r;
+	d = a / b;
+	r = a - d * b;
+	a = b;
+	if (r == 0)
+		printf("Greatest Common Divisor =%d", b);
+	else
+	{
+		b = r;
+		fun_gcd(a, b);
+	}
+}

3_Functions/PFactors.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+void PFactor(int num)
+{
+  int i = 2;
+  if (num == 1)
+    return;
+  if (num % i != 0)
+    i++;
+  printf("%d\t", i);
+  PFactor(num / i);
+}
+void main()
+{
+  int num;
+  printf("Enter a number:\n");
+  scanf("%d", &num);
+  printf("Prime Factors of %d are:\n\n", num);
+  PFactor(num);
+}

3_Functions/Pascals_triangle.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+
+long factorial(int);
+long comb(int, int);
+int main(void)
+{
+	int i, j, k;
+
+	printf("Enter number of rows of pascal's triangle : ");
+	scanf("%d", &k);
+	for (i = 0; i < k; i++)
+	{
+		for (j = 0; j <= i; j++)
+			printf("%5ld", comb(i, j));
+		printf("\n");
+	}
+	return 0;
+}
+long comb(int n, int r)
+{
+	long c;
+	c = factorial(n) / (factorial(r) * factorial(n - r));
+	return c;
+}
+long int factorial(int n)
+{
+	int i;
+	long int fact = 1;
+	if (n == 0)
+		return 1;
+	for (i = n; i > 1; i--)
+		fact *= i;
+	return fact;
+}

3_Functions/Reverse_number.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int reverse(int);
+int main(void)
+{
+	int num;
+	printf("Enter a number : ");
+	scanf("%d", &num);
+	printf("Reverse  : %d ", reverse(num));
+}
+
+int reverse(int n)
+{
+	int rev = 0;
+	do
+	{
+		rev = rev * 10 + n % 10;
+		n /= 10;
+	} while (n > 0);
+	return rev;
+}

3_Functions/Reverse_number_palindrom.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+int isPalindrome(long int);
+long int reverse(long int);
+int main(void)
+{
+	int num;
+	printf("Enter a number : ");
+	scanf("%ld", &num);
+	printf("Reverse  : %ld \n", reverse(num));
+	if (isPalindrome(num))
+		printf("Number is palindrome..");
+	else
+		printf("Number is not palindrome..");
+}
+int isPalindrome(long int n)
+{
+	if (n == reverse(n))
+		return 1;
+	return 0;
+}
+
+long int reverse(long int n)
+{
+	long int rev = 0;
+	do
+	{
+		rev = rev * 10 + n % 10;
+		n /= 10;
+	} while (n > 0);
+	return rev;
+}

3_Functions/Roman_numbers.c

@@ -0,0 +1,45 @@
+#include <stdio.h>
+
+int roman(int, int, char);
+int main(void)
+{
+	int num;
+
+	printf("Enter a number : ");
+	scanf("%d", &num);
+	if (num >= 1000)
+		num = roman(num, 1000, 'm');
+	if (num >= 500)
+		num = roman(num, 500, 'd');
+	if (num >= 100)
+		num = roman(num, 100, 'c');
+	if (num >= 50)
+		num = roman(num, 50, 'l');
+	if (num >= 10)
+		num = roman(num, 10, 'x');
+	if (num >= 5)
+		num = roman(num, 5, 'v');
+	if (num >= 1)
+		roman(num, 1, 'i');
+	printf("\n");
+	return 0;
+}
+int roman(int n, int k, char c)
+{
+	if (n == 9)
+	{
+		printf("ix");
+		return 0;
+	}
+	if (n == 4)
+	{
+		printf("iv");
+		return 0;
+	}
+	while (n >= k)
+	{
+		printf("%c", c);
+		n = n - k;
+	}
+	return n;
+}

3_Functions/Square_root.c

@@ -0,0 +1,26 @@
+//program for find square root of a given number
+
+#include <stdio.h>
+
+int square_root(int n)
+{
+    int i = 1, result = 0;
+
+    while (result <= n)
+    {
+        i++;
+        result = i * i;
+    }
+    return i - 1;
+}
+
+int main(void)
+{
+    int num;
+
+    printf("Enter any number : ");
+    scanf("%d", &num);
+
+    printf("Square Root of %d is = %d ", num, square_root(num));
+    return 0;
+}