Questions ab an answer...

i don't have an answer key or anything for this textbook, but did i get this correct?

#7- Rearrange the square3.c program so that the FOR loop initializes 'i', tests 'i', and increments 'i'. Don't rewrite the program; in particular, don't use any multiplications.

Code:

---

* SEC6.3 EX7      */
/* DATE: 08-08-02  */

#include <stdio.h>

int main()
{
        int i, n, odd, square;

        printf("This program prints a table of squares.\n");
        printf("Enter number of entries in table: ");
        scanf("%d", &n);
       
        square = 1;
        odd = 3;
        for (i = 1; i <= n; odd+= 2) {
                printf("%10d%10d\n", i, square);
                ++i;
                square += odd;
        }

        return 0;
}

---

...and here's my code from the square3.c program:

Code:

---

/* Prints a table of squares using an old method */
/* DATE: 07-24-02                                                                */

#include <stdio.h>

int main()
{
        int i, n, odd, square;

        printf("This program prints a table of squares.\n");
        printf("Enter number of entries in table: ");
        scanf("%d", &n);

        i = 1;
        odd = 3;
        for (square = 1; i <= n; odd+= 2) {
                printf("%10d%10d\n", i, square);
                ++i;
                square += odd;
        }

        return 0;
}

---

I'd say you need to have another go ;)

Look at this part of the question:

Quote:

---

... so that the FOR loop initializes 'i', tests 'i', and increments 'i'.

---

This says to me that you need a for statement that looks like this

Code:

---

for (i = 1; i <= n; i++) {

---

... and the appropriate code moved around to make this work.

>for (i = 1; i <= n; odd+= 2) {
Simple enough, look into the usage of the comma operator and throw the increment for i into the loop.

-Prelude

would this be correct? :

Code:

---

/* SEC6.3 EX7      */
/* DATE: 08-09-02  */

#include <stdio.h>

int main()
{
        int i, n, odd, square;

        printf("This program prints a table of squares.\n");
        printf("Enter number of entries in table: ");
        scanf("%d", &n);
       
        square = 1;
        odd = 3;
        for (i = 1; i <= n; i++, odd+= 2) {
                printf("%10d%10d\n", i, square);
                square += odd;
        }

        return 0;
}

---

/* DATE: 08-09-02 */

#include <stdio.h>

int main()
{
int i, n, odd, square;

printf("This program prints a table of squares.\n");
printf("Enter number of entries in table: ");
scanf("%d", &n);

square = 1;
odd = 3;
for (i = 1; i <= n; i++, odd+= 2) {
printf("%10d%10d\n", i, square);
square += odd;
}

return 0;
}

+++++++++++++++++++++++++++++++++++++++
What did you get (answer)when you typed the program in like this???

Was is correct?? Let us know.

Mr. C.

I got the right output... but I got the correct output when using the code that I thought was previously correct... so I'm hoping one of you guys will know the answer to this C prog Q!:)

...btw, forgot to sign in (the unregistered response before this one is mine's~!:)

Quote:

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Originally posted by Unregistered
I got the right output... but I got the correct output when using the code that I thought was previously correct... so I'm hoping one of you guys will know the answer to this C prog Q!:)

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So, in summary we started with this:

Code:

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for (i = 1; i <= n; odd+= 2)

---

and the exercise was change it so....

Quote:

---

the FOR loop initializes 'i', tests 'i', and increments 'i'

---

And you made it into:

Code:

---

for (i = 1; i <= n; i++, odd+= 2) {

---

Do you think all the criteria has been met? It looks like it to me.

yea~!!!!!!!!!!!!!!! thanx so much Hammer (and everyone else) for your help!!:)