Multiplication Via Addition

[htdefiant 0]

I'm looking for some brainstorming help. The task is to create a program where the user enters two integers, and have them multiply without using the multiplication function. For example, if the user enters 5 and 10, the program is supposed to go 10+10+10+10+10, not 5*10. I have gotten as far getting input from the user. I am thinking of using a while loop for this. Does anyone have suggestions as to the best way to do this with the while statement? Thanks.

[galexcd 0]

I think a for loop would be easier:

int total=0;for(int i=0;i<firstnumber;i++) total+=secondnumber;

[htdefiant 0]

I am not familiar with or loops. Perhaps you could describe the best method to use with a while loop?Thanks for your help.

[galexcd 0]

Sure it just takes a little bit more code for the same results:

int total=0;int i=0;while(i<firstnumber){total+=secondnumber;i++;}

[htdefiant 0]

Sorry to keep perpetuating this - you've been very helpful - what is that programming in C, not C++?Thanks for you help,A fellow OS X geek

[galexcd 0]

It actually should work in both c and c++, and even java if you declare those variables inside a method. Most programming languages have extremely similar syntax.

Edited September 23, 2007 by alex7h3pr0gr4m3r (see edit history)

[htdefiant 0]

Sorry Alex - I am very new at this. Here is what I have:

main (){     int num1, num2, num3;     printf("Please an integer:\n");     num1=GetInteger();     printf("Please a second integer:\n");     num2=GetInteger();     while (num2>1)     {           }     getchar ();     return 0;     }

How do I apply the code you gave me to this base?

[galexcd 0]

try this... num3 is the result of num1 times num2

int num1, num2, num3=0;	 printf("Please an integer:\n");	 num1=GetInteger();	 printf("Please a second integer:\n");	 num2=GetInteger();	 int i=0;	 while(i<num1){		  num3+=num2;		  i++;	 }	 getchar ();	 return 0;	 }

[htdefiant 0]

Thanks

[galexcd 0]

Thanks

Everything works how it should? No more problems? If so great and good luck with the rest of the project.

Feel free to PM me with any questions you still may have!

[htdefiant 0]

Nope, no prolems.