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Hello everyone! In school we've been learning programming in C. Well i knew alot of programming before we learned it but still I'm stuck on a project we had to finish. We got 5 projects and i've completed 4 of them, really easy. We've just been learning the basics like loops, if, else, arrays and easy stuff which i already knew but in this project i have to scan 5 numbers and print them in the opposite order and i don't actually know how i can do this.. I have an example here but i wonder if there are any better ways to do it?

C++

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  int number1, number2, number3, number4, number5; //Numbers to input
  
  printf("Enter five numbers. First number: ");
  scanf("%d", &number1);
  printf("Second number: ");
  scanf("%d", &number2);
  printf("Third number: ");
  scanf("%d", &number3);
  printf("fourth number: ");
  scanf("%d", &number4);
  printf("fifth number: ");
  scanf("%d", &number5);
  
  printf("%d, %d, %d, %d, %d", number5, number4, number3, number2, number1);
  
  getch();	
  return 0;
}

It doesn't look very good done, does it? Could i use an array or something and do this in a better way? if so, how?

Posted 24-Mar-14 2:45am

Gramas19

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nv3 24-Mar-14 8:51am

Exactly, use an array and a loop running from 0 ... 4 to read the number and a second loop from 4 ... 0 to print them.

3 solutions

Solution 1

You've mentioned one way of doing it for yourself!

Why not assign the numbers into an array as they are entered, then display them by starting at the end of the array and working backwards?

Posted 24-Mar-14 2:53am

CHill60

Comments

Gramas19 24-Mar-14 8:55am

Yeah, but how can i start from the end? I don't know that :s

CHill60 24-Mar-14 9:25am

Well there are ways of finding out the size of an array, so start your loop with that number and decrement your loop counter each time until it reaches 0. That link that Aarti has posted is really good for looking things like this p

Aarti Meswania 24-Mar-14 9:11am

5!+ :)

CHill60 24-Mar-14 9:22am

Thank you!

Aarti Meswania 24-Mar-14 9:25am

Welcome! :)

Solution 2

http://www.cprogramming.com/tutorial/c/lesson8.html
check link there is a program with char array you can judge from that how do this with integer array

in that program values scanned in a loop and printed using a loop
this is advantage of using array it will reduce code.
no need to declare too many variables number1,number2...,number5 and also no need to write too many lines to scan

Happy Coding!
:)

Posted 24-Mar-14 3:12am

Aarti Meswania

Comments

Gramas19 24-Mar-14 9:31am

I still don't get it, could you write it in code how you mean? I'm a bit unknowing about arrays so i have to learn it better :)

Aarti Meswania 24-Mar-14 9:41am

sorry but you should do it your self I have already given explaination why array is used and also given a link to see an example

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Richard MacCutchan · Accepted Answer · 2014-03-24T04:11:00

// simple array

C++

int main(int argc, char *argv[])
{
    int index;
    int number[5]; //Numbers to input
  
    printf("Enter five numbers\n");

    for (index = 0; index < 5; index++)
    {
        printf("Next number: ");
        scanf("%d", &number[index]);
    }

    for (index = 4; index > -1; index--)
    {
        printf("%d", number[index]);
        if (index > 0)
            printf(", ");
    }
    printf("\n");

    getch();	
    return 0;
}

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