Solution for Exercise 19-11

ex1911

#include <stdio.h>

int main()
{
    enum weekdays { mon, tues, wed, thurs, fri };
    float temps[5] = { 18.7, 22.8, 25.0, 23.3, 23.2 };
    float *t;

    t = temps;                /* initialize the pointer */
    printf("The temperature on Tuesday was %.1f\n",
            *(t+tues) );
    printf("The temperature on Friday was %.1f\n",
            *(t+fri) );
    return(0);
}

Output

The temperature on Tuesday was 22.8
The temperature on Friday was 23.2

Notes

* Here is a way to express the solution without using enumerated constants:

#include <stdio.h>

int main()
{
    float temps[5] = { 18.7, 22.8, 25.0, 23.3, 23.2 };
    float *t;

    t = temps;                /* initialize the pointer */
    printf("The temperature on Tuesday was %.1f\n",
            *(t+1) );
    printf("The temperature on Friday was %.1f\n",
            *(t+4) );
    return(0);
}

* Here is a literal solution to the problem:

#include <stdio.h>

int main()
{
    float temps[5] = { 58.7, 62.8, 65.0, 63.3, 63.2 };

    printf("The temperature on Tuesday will be %.1f\n",
            *(temps+1));
    printf("The temperature on Friday will be %.1f\n",
            *(temps+4));
    return(0);
}

* I don't recommend mixing pointer notation with an array variable, as shown above, but it works.

Exercise ex1912 →