03-10-2011 Usage of Logical Operators(smallest and highest number)

/*Program takes values from user and tells which one was highest and which one was smallest*/

#include<stdio.h>

#include<conio.h>

main()

{

      int num = 0, smallest=0, highest = 0, counter = 0;

      while (num != -1)

      {

            printf("Please enter the number or -1 to see results: ");

            scanf("%d",&num);

            if ((smallest >= num && num !=-1) || (counter==0))

            {

               smallest = num;

            }

            if ((highest <= num && num != -1)||(counter == 0))

            {

                 highest = num;

            }

            counter++;

      }

      printf("\nSmallest entered value is: %d \nand the highest entered value is: %d \n\nSo the range is %d",smallest,highest,(highest-smallest));

      getche();

}          

           

03-10-2011 Calculation of Power of a digit

/*This program calculates the power of a digit upto another user entered digit*/

#include<stdio.h>

#include<conio.h>

main()

{

      int digit=1, power=1, temp=1, counter;

      printf("Please enter the digit: ");

      scanf("%d",&digit);

      printf("now enter its power: ");

      scanf("%d",&power);

      temp=digit;

      for(counter = 1; counter < power ; counter++ )

          {

          temp = temp * digit;

          }    

      printf("%d raised to power %d answers: %d",digit,power,temp);

      getche();

}

     

     

03-10-2011 Example of Usage of Conditional Operators

/*This program takes marks of student, uses conditional operators to check them and shows either he is pass or fail*/

#include<stdio.h>

#include<conio.h>

main()

{

      int numbers = 0;

      printf("Please enter marks: ");

      scanf("%d", &numbers);

      (numbers >= 60)? printf( "Pass") : printf("Fail");

      getche();

}

/*

is same as

        int numbers = 0;

      printf("Please enter marks: ");

      scanf("%d", &numbers);

      if (numbers >= 60)

         {

         printf("Pass");

         }

      else

          {

          printf("Fail");

          }

      getche();

      return 0;

     

      */

03-10-2011 Example of Usage of if else

/*This program takes marks of student and shows either he is pass or fail*/

#include<stdio.h>

#include<conio.h>

main()

{

      int numbers = 0;

      printf("Please enter marks: ");

      scanf("%d", &numbers);

      if (numbers >= 60)

         {

         printf("Pass");

         }

      else

          {

          printf("Fail");

          }

      getche();

      return 0;

}

    

03-10-2011 Working of Increament and Short Hand Operators

/*Just an example of usage of increment operators and short hand operators*/

#include<stdio.h>

#include<conio.h>

main()

{

      int a = 1, b = 1, c = 1, d = 1 ;

      printf("\n a prints: %d when a = 1",a);

      printf("\na++ prints: %d when a =1",a++);

      printf("\n++b prints: %d when b=1",++b);

      printf("\nwhen a = %d and b = %d then a+=b used inside printf prints: %d",a,b,(a+=b));

      c=a;

      d=b;

      b+=a;

      printf("\nwhen a = %d and b = %d then b+=a used before printf prints: %d",c,d,(b+=a));

      getche();

}

03-10-2011 Checking Problems by No Initialization

/*no Initialization can make logical errors*/

#include<stdio.h>

#include<conio.h>

main()

{

      int a;

      printf("%d",a++);

      getche();

}

03-10-2011 Increament Operator

/*This program prints a++ then a when a is initialized with 1*/

#include<stdio.h>

#include<conio.h>

main()

{

      int a = 1;

      printf("a++ prints: %d when a = 1",a++);

      printf("\nafter doing a++ 'a' prints: %d",a);

      getche();

}