Programming Forums > Application Development > C

casesensitive · Jun 1st, 2008, 6:56 PM

#include "stdio.h" 

int main (void)
{               

 /* Assigns variables and assigns them to zero */

	int bigInt = 0;  
	int smallInt = 0;
	int randomInt = 0;      
	int count = 0;       

        while(count <= 4) 
		{
        printf("Enter a number :"); 
	    scanf("%d", &randomInt);
	    count = ++count; 
		if(randomInt >= smallInt) 
                     {
                     smallInt = randomInt;
                     }
                    if(randomInt >= bigInt)
                     {
                     smallInt = bigInt;
                     bigInt = randomInt;
                     }
                    
         }
	printf("The largest number is : %d\n", bigInt);
	printf("The second largest number is : %d\n", smallInt);

	return 0;
	
}

The assignment was to take in 5 random numbers and output the largest two of them. When I was looking at other peoples algorithms they all had something in common(the people who used loops) They all checked if the number they entered was higher than the highest first; While I thought that if the number wasn't larger then the smallest they was no need to check further an you could just go get the next number. In my code I think even if it doesn't go true for randomInt >= smallInt it still goes and checks if randomInt >= bigInt. How do I get it to just stop if the first if statement fails and just return to go through the loop again?

Jimbo · Jun 1st, 2008, 8:10 PM

To just go to the next iteration of the loop, you can use continue;, and to quit the loop you can use break;. However, I'd suggest the following change for your logic (see the comments):

 c Syntax (Toggle Plain Text) 
        while(count <= 4) 
	{
            printf("Enter a number :"); 
	    scanf("%d", &randomInt);
	    count = ++count; 
            // first check if it's the biggest, as this case involves the most work
            if(randomInt >= bigInt)
            {
                smallInt = bigInt;
                bigInt = randomInt;
            }
            // if that didn't happen, check the other scenario
	    else if(randomInt >= smallInt) 
            {
                smallInt = randomInt;
            }
            // otherwise there's nothing to do, no need to add extra logic
         }
        while(count <= 4) 
	{
            printf("Enter a number :"); 
	    scanf("%d", &randomInt);
	    count = ++count; 
            // first check if it's the biggest, as this case involves the most work
            if(randomInt >= bigInt)
            {
                smallInt = bigInt;
                bigInt = randomInt;
            }
            // if that didn't happen, check the other scenario
	    else if(randomInt >= smallInt) 
            {
                smallInt = randomInt;
            }
            // otherwise there's nothing to do, no need to add extra logic
         }

casesensitive · Jun 1st, 2008, 8:14 PM

I think you kind of missed the point I was trying to get at. Thats easy enough. But if the new number isn't as big as the smallest number already they isn't a reason to continue with the loop. Ive already wrote it like that also. Sorry for the confusion. I want to drop out of the loop and immediatly go get another number if the first number isn't as large as the the one in the lowest place already.

I don't think continue or break will work fr what i'm trying to say.

iEngage · Jun 1st, 2008, 8:35 PM

i think that if you put an ELSE in front of your second IF it will do what you are trying to say... i could be confused though

and the way you two are going about it is exactly the same just with the IF statements flipped...

casesensitive · Jun 1st, 2008, 8:38 PM

Quote:

Originally Posted by iEngage

i think that if you put an ELSE in front of your second IF it will do what you are trying to say... i could be confused though

and the way you two are going about it is exactly the same just with the IF statements flipped...

No that wouldn't work. If I put an else in front the first statement may come back true and the second one wouldnt be evaluated at all.
Im not arugueing.. The second one needs to be checked if the first one comes back true.

iEngage · Jun 1st, 2008, 8:43 PM

oh ok i see what your trying to say... sorry.
try it like this:

 c++ Syntax (Toggle Plain Text) 
while(count <= 4) 
		{
        printf("Enter a number :"); 
	    scanf("%d", &randomInt);
	    count = ++count; 
		if(randomInt >= smallInt) 
                {
                     smallInt = randomInt;
                 }
                else
                {
                     continue;
                }
                if(randomInt >= bigInt)
                {
                     smallInt = bigInt;
                     bigInt = randomInt;
                }
 
         }
while(count <= 4) 
		{
        printf("Enter a number :"); 
	    scanf("%d", &randomInt);
	    count = ++count; 
		if(randomInt >= smallInt) 
                {
                     smallInt = randomInt;
                 }
                else
                {
                     continue;
                }
                if(randomInt >= bigInt)
                {
                     smallInt = bigInt;
                     bigInt = randomInt;
                }
                    
         }

Although.. the way Jimbo has it is cleaner, and checking it one extra time really won't lose much processing time at all... you won't even notice a difference

casesensitive · Jun 1st, 2008, 8:48 PM

ok thanks for the help. I actually hopes this class gets harder. They was a thousand ways I thought about how to do this it seems. They aren't suppose to be but about 10 "projects" from the begining till the end. You should of seen the flow chart the for the first way I had it. It was a five page print-out.

iEngage · Jun 1st, 2008, 9:12 PM

hehe sounds like fun

casesensitive · Jun 1st, 2008, 10:19 PM

Quote:

Originally Posted by iEngage

hehe sounds like fun

Yes, but sometimes I fall asleep in class. Its just like high school. I think I need some focus meds. It's just tech school I don't know how in depth it will go. I'm taking C over the summer with a web-design class. Two online classes but both of them are remedial. From the syllabus its only going to get to chapter 11 in the book that has 27 chapters. He says they use the same book for C++ so I guess it will be coming in the fall semester. I really don't know how he's going to teach object oriented programming from a C book, but I guess its possible.

Jun 1st, 2008, 6:56 PM	#1
casesensitive Programmer Join Date: Oct 2007 Posts: 41 Rep Power: 0	homeWork (Toggle Plain Text) #include "stdio.h" int main (void) { /* Assigns variables and assigns them to zero / int bigInt = 0; int smallInt = 0; int randomInt = 0; int count = 0; while(count <= 4) { printf("Enter a number :"); scanf("%d", &randomInt); count = ++count; if(randomInt >= smallInt) { smallInt = randomInt; } if(randomInt >= bigInt) { smallInt = bigInt; bigInt = randomInt; } } printf("The largest number is : %d\n", bigInt); printf("The second largest number is : %d\n", smallInt); return 0; } #include "stdio.h" int main (void) { / Assigns variables and assigns them to zero */ int bigInt = 0; int smallInt = 0; int randomInt = 0; int count = 0; while(count <= 4) { printf("Enter a number :"); scanf("%d", &randomInt); count = ++count; if(randomInt >= smallInt) { smallInt = randomInt; } if(randomInt >= bigInt) { smallInt = bigInt; bigInt = randomInt; } } printf("The largest number is : %d\n", bigInt); printf("The second largest number is : %d\n", smallInt); return 0; } The assignment was to take in 5 random numbers and output the largest two of them. When I was looking at other peoples algorithms they all had something in common(the people who used loops) They all checked if the number they entered was higher than the highest first; While I thought that if the number wasn't larger then the smallest they was no need to check further an you could just go get the next number. In my code I think even if it doesn't go true for randomInt >= smallInt it still goes and checks if randomInt >= bigInt. How do I get it to just stop if the first if statement fails and just return to go through the loop again?

Jun 1st, 2008, 8:10 PM	#2
Jimbo Battle Programmer Join Date: Feb 2006 Location: Bellevue, WA, USA Posts: 763 Rep Power: 3	Re: homeWork To just go to the next iteration of the loop, you can use `continue;`, and to quit the loop you can use `break;`. However, I'd suggest the following change for your logic (see the comments): c Syntax (Toggle Plain Text) while(count <= 4) { printf("Enter a number :"); scanf("%d", &randomInt); count = ++count; // first check if it's the biggest, as this case involves the most work if(randomInt >= bigInt) { smallInt = bigInt; bigInt = randomInt; } // if that didn't happen, check the other scenario else if(randomInt >= smallInt) { smallInt = randomInt; } // otherwise there's nothing to do, no need to add extra logic } while(count <= 4) { printf("Enter a number :"); scanf("%d", &randomInt); count = ++count; // first check if it's the biggest, as this case involves the most work if(randomInt >= bigInt) { smallInt = bigInt; bigInt = randomInt; } // if that didn't happen, check the other scenario else if(randomInt >= smallInt) { smallInt = randomInt; } // otherwise there's nothing to do, no need to add extra logic } __________________ <insert disclaimer here> <insert shameless plug for Visual Studio here>

Jun 1st, 2008, 8:14 PM	#3
casesensitive Programmer Join Date: Oct 2007 Posts: 41 Rep Power: 0	Re: homeWork I think you kind of missed the point I was trying to get at. Thats easy enough. But if the new number isn't as big as the smallest number already they isn't a reason to continue with the loop. Ive already wrote it like that also. Sorry for the confusion. I want to drop out of the loop and immediatly go get another number if the first number isn't as large as the the one in the lowest place already. I don't think continue or break will work fr what i'm trying to say.

Jun 1st, 2008, 8:35 PM	#4
iEngage Newbie Join Date: May 2008 Location: teh interwebz Posts: 22 Rep Power: 0	Re: homeWork i think that if you put an ELSE in front of your second IF it will do what you are trying to say... i could be confused though and the way you two are going about it is exactly the same just with the IF statements flipped... __________________ iEngage Last edited by iEngage; Jun 1st, 2008 at 8:36 PM. Reason: clarity

Jun 1st, 2008, 8:43 PM	#6
iEngage Newbie Join Date: May 2008 Location: teh interwebz Posts: 22 Rep Power: 0	Re: homeWork oh ok i see what your trying to say... sorry. try it like this: c++ Syntax (Toggle Plain Text) while(count <= 4) { printf("Enter a number :"); scanf("%d", &randomInt); count = ++count; if(randomInt >= smallInt) { smallInt = randomInt; } else { continue; } if(randomInt >= bigInt) { smallInt = bigInt; bigInt = randomInt; } } while(count <= 4) { printf("Enter a number :"); scanf("%d", &randomInt); count = ++count; if(randomInt >= smallInt) { smallInt = randomInt; } else { continue; } if(randomInt >= bigInt) { smallInt = bigInt; bigInt = randomInt; } } Although.. the way Jimbo has it is cleaner, and checking it one extra time really won't lose much processing time at all... you won't even notice a difference __________________ iEngage

Jun 1st, 2008, 8:48 PM	#7
casesensitive Programmer Join Date: Oct 2007 Posts: 41 Rep Power: 0	Re: homeWork ok thanks for the help. I actually hopes this class gets harder. They was a thousand ways I thought about how to do this it seems. They aren't suppose to be but about 10 "projects" from the begining till the end. You should of seen the flow chart the for the first way I had it. It was a five page print-out.

Jun 1st, 2008, 9:12 PM	#8
iEngage Newbie Join Date: May 2008 Location: teh interwebz Posts: 22 Rep Power: 0	Re: homeWork hehe sounds like fun __________________ iEngage

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