Sample Questions and answers

1. Program to find whether the character is lower case or upper case

   #include <stdio.h>
    int main()
   {
        int islow (char); 
        char chr; 
        printf ("Enter a character 
   "); 
        scanf ( "%c", &chr); 
        if (islow(chr))
           printf ("The character is of lower case
   ");
        else
            printf ("The character is of upper case
   "); 
   }
   
   int islow (char ch)
   {
       if (ch >= 97 && ch < = 122)
          return (1);
       else
         return (0);
   }
   

   Run
2. Program to determine if a character is alphabetic

   #include <stdio.h> 
   int main () 
   {
       int chr;
       int is_alpha (char); 
       printf ("Enter the character...
   "); 
       scanf ("%c",&chr); 
       if (is_alpha (chr))
          printf ("The character is alphabetic 
   ");
       else
          printf ("The character is not alphabetic 
   ");	
   }
   
   int is_alpha (char ch)
   {
       if ((ch >= 'a" && ch <= 'z") || (ch >= 'A" && ch <= 'Z"))
         return (1);
       else
          return (0);
   }
   

   Run
3. Function to find sum and difference of two numbers

   #include <stdio.h> 
   int main ()
   {
       int sum (int, int); 
       int diff (int, int);
       int num1, num2; 
       int add_result, diff_result; 
       printf ("Enter any two numbers 
   "); 
       scanf ( "%d%d", &num1, &num2) ; 
       add_result = sum (num1, num2); 
       diff_result = diff (num1, num2);
       printf ("The sun of two numbers is %d
   ", add_result);
       printf ("The difference between two numbers is %d
   ", diff_result);
   }
   
   int sum (int n1, int n2)
   {
       int res; 
       res = n1 + n2; 
       return (res); 
   }
   
   int diff (int n1, int n2)
   { 
       int res; 
       res = n1 - n2;
       return(res);
   }
   

   Run
4. Program to find the sum of digits of a number

   #include <stdio.h>
    int main ()
   {
       int sum of digit (int);
       int num, sum;
       printf("Enter the number
   ");
       scanf("%d", &num); 
       sum = sum_of_digit (num); 
       printf ("The sum of individual digits of a number in %d", sum);
   }
   
   int sum_of_digit(int n)
   {
       float digit;
       int count = 0;
       int s = 0;
       while (n! = 0)
       {
   	digit = n % 10;
           count ++; 
           s = s + digit;
           n = n / 10;
       }
   printf ("The number of digits in the number = %d
   ", count);
   return(s);
   }
   

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