Sams Teach Yourself C in 21 Days

Answers 843

F

scanf( “%d”, &x );

printf( “\nThe value entered is %d\n”, x );

return 0;

}

4. It’s typical to edit a program to allow only specific values to be accepted. The fol-
   lowing is one way to accomplish this exercise:
   #include <stdio.h>
   int x;

int main( void )

{

puts( “Enter an even integer value” );

scanf( “%d”, &x );

while( x % 2 != 0)

{

printf( “\n%d is not even, Please enter an even \

number: “, x );

scanf( “%d”, &x );

}

printf( “\nThe value entered is %d\n”, x );

return 0;

}

5. The code is as follows:
   #include <stdio.h>
   int array[6], x, number;
   int main( void )
   {
   / loop 6 times or until the last entered element is 99 /
   for( x = 0; x < 6 && number != 99; x++ )
   {
   puts( “Enter an even integer value, or 99 to quit” );
   scanf( “%d”, &number );
   while( number % 2 == 1 && number != 99)
   {
   printf( “\n%d is not even, Please enter an even \
   number: “, number);
   scanf( “%d”, &number );
   }
   array[x] = number;
   }
   / now print them out... /
   for( x = 0; x < 6 && array[x] != 99; x++ )
   {
   printf( “\nThe value entered is %d”, array[x] );

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