scratchyourbrain

#include <stdio.h>
int main()
{
    int a;
    float b;
    double c;
    char d;
    printf("Size of int: %d bytes\n",sizeof(a));
    printf("Size of float: %d bytes\n",sizeof(b));
    printf("Size of double: %d bytes\n",sizeof(c));

scratchyourbrain

#include <stdio.h>
int main()
{
      int a, b, temp;
      printf("Enter value of a: ");
      scanf("%d",&a);
      printf("Enter value of b: ");
      scanf("%d",&b);
      temp = a;    /* Value of a is stored in variable temp */
      a = b;       /* Value of b is stored in variable a */

scratchyourbrain

#include <stdio.h>
int main()
{
      int num;
      printf("Enter an integer you want to check: ");
      scanf("%d",&num);
      if((num%2)==0)      /* Checking whether remainder is 0 or not. */
           printf("%d is even.",num);
      else
           printf("%d is odd.",num);

scratchyourbrain

#include <stdio.h>
int main()
{
  char c;
  printf("Enter an alphabet: ");
  scanf("%c",&c);
  if(c=='a'||c=='A'||c=='e'||c=='E'||c=='i'||c=='I'||c=='o'||c=='O'||c=='u'||c=='U')
       printf("%c is a vowel.",c);
  else
       printf("%c is a consonant.",c);

scratchyourbrain

#include <stdio.h>
int main()
{
      float a, b, c;
      printf("Enter three numbers: ");
      scanf("%f %f %f", &a, &b, &c);
      if(a>=b && a>=c)
         printf("Largest number = %.2f", a);
      else if(b>=a && b>=c)
         printf("Largest number = %.2f", b);

scratchyourbrain

#include <stdio.h>
int main()
{
      int year;
      printf("Enter a year: ");
      scanf("%d",&year);
      if(year%4 == 0)
      {
          if( year%100 == 0) /* Checking for a century year */
          {

scratchyourbrain

#include <stdio.h>
int main()
{
    char c;
    printf("Enter a character: ");
    scanf("%c",&c);
    if( (c>=65 && c<=90) || (c>=97 && c<=122))
       printf("%c is an alphabet.",c);
    else
       printf("%c is not an alphabet.",c);

scratchyourbrain

#include <stdio.h>
int main()
{
    float num;
    printf("Enter a number: ");
    scanf("%f",&num);
    if (num<0)      /* Checking whether num is less than 0*/
      printf("%.2f is negative.",num);
    else if (num>0)   /* Checking whether num is greater than zero*/
      printf("%.2f is positive.",num);

scratchyourbrain

#include <stdio.h>
int main()
{
    int n, count;
    int factorial=1;
    printf("Enter an integer: ");
    scanf("%d",&n);
    if ( n< 0)
        printf("Error!!! Factorial of negative number doesn't exist.");
    else

scratchyourbrain

#include <stdio.h>
int main()
{
  int num1, num2, max;
  printf("Enter two positive integers: ");
  scanf("%d %d", &num1, &num2);
  max=(num1>num2) ? num1 : num2; /* maximum value is stored in variable max */
  while(1)                       /* Always true. */
  {
      if(max%num1==0 && max%num2==0)