Sams Teach Yourself C in 21 Days

Answers 839

F

5: int number1 = 10,

6: number2 = 5;

7: int x, y, z;

8:

9: x = product( number1, number2 );

10: y = divide_em( number1, number2 );

11: z = divide_em( number1, 0 );

12:

13: printf( “\nnumber1 is %d and number2 is %d”, number1, number2 );

14: printf( “\nnumber1 * number2 is %d”, x );

15: printf( “\nnumber1 / number2 is %d”, y );

16: printf( “\nnumber1 / 0 is %d”, z );

17:

18: return 0;

19: }

10. The code is as follows:
    / Averages five float values entered by the user. /
    #include <stdio.h>
    float v, w, x, y, z, answer;

float average(float a, float b, float c, float d, float e);

int main( void )

{

puts(“Enter five numbers:”);

scanf(“%f%f%f%f%f”, &v, &w, &x, &y, &z);

answer = average(v, w, x, y, z);

printf(“The average is %f.\n”, answer);

return 0;

}

float average( float a, float b, float c, float d, float e)

{

return ((a+b+c+d+e)/5);

}

11. The following is the answer using type intvariables. It can run only with values
    less than or equal to 9. To use values larger than 9 , you need to change the values
    to type long.
    / this is a program with a recursive function /
    #include <stdio.h>

int three_powered( int power );

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