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MegaForum
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 Posted: Thu Jul 03, 2008 12:41 pm Post subject: [Help]C++ Loops |
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Edit: Thanks to HalfPrime, lurc, Flyte, noz3001 for helping the most so far  . I've been following your ideas and advice and am close to finishing... I just have 1 error. Can help me fix it, ty
fatal error C1083: Cannot open include file: 'ctime.h': No such file or directory
Here's my new code as well. I might of screwed something up XD.
| Code: |
#include "iostream.h"
#include "stdlib.h"
#include "ctime.h"
using namespace std;
int main()
{
int number1;
int number2;
int number3;
int tries;
int mynumber = rand() % 100 + 1;
cout << "You get 3 tries to match my number! 1-99"<< endl;
for(int tries=1; tries <=3; tries++)
{
cout << "Enter your number" << tries << endl;
cin >> number;
if(number == mynumber)
{
cout << "You got my number correct!" << endl;
break;
}
else if(number != mynumber)
{
cout << "Your nubmer is incorrect!" << endl;
}
}
system("PAUSE");
return 0;
}
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Thanks for the help. 
Last edited by MegaForum on Thu Jul 03, 2008 9:13 pm; edited 1 time in total |
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lurc
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| Posted: Thu Jul 03, 2008 12:52 pm Post subject: |
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Make an array of integer's and then create a for loop.
Array:
int nNums[3];
For loop:
for ( initialize variables ; condition ; inc/dec/sleep/etc )
Then just do
cin >> nNums[i]; // if i was the number u initialized in your for loop.
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hcavolsdsadgadsg
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| Posted: Thu Jul 03, 2008 1:01 pm Post subject: |
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<iostream>
<stdlib.h>
use this instead of system("PAUSE")
cin.sync()
cin.ignore()
It's a fine idea, go for it, maybe rework it a bit though so it's a bit more fun and fair heh
Create an array of some random numbers.
Then just have it loop until the person gets the number. If they get it wrong, have it tell them if it's higher or lower, if they get it right, increment. Once they get so many right, stop.
Just use a do while loop.
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HalfPrime
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| Posted: Thu Jul 03, 2008 1:08 pm Post subject: |
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add "#include <windows.h>" to give you access to the clock() function. This is one of the functions used to generate random numbers. It returns how long the program has been open for.
the mod operator "%" returns the remainder of a division between 2 numbers. ie 13%4 would return 1 as 13 is 1 more than 12(4*3). You can use this to get a number from 1-99 from clock(). mynumber=(clock()%99)+1.
If you look at your source, you repeat that block of code 3 times. This is an excellent place for a loop. a for loop is just a while loop that does some extra stuff automatically for you.
| Code: | for(int tries=1;tries <=3;tries++){
cout <<"Enter number" << tries << endl;
cin >> number;
if(number == mynumber)
{
cout <<"You got my number correct!"<< endl;
break;
}
else if(number != mynumber)
{
cout <<"Your number is incorrect!"<< endl;
}
} |
The for loop will repeat from 1 to 3 taking in a number and comparing it to the random number. if they're equal, it'll say you win and "break;". This means it will break out of the for loop and go down to the system("PAUSE") and return. if they're not equal, it will say that and start the loop again.
Once you understand this and want to improve, try seeing if you can tell them whether the number is higher or lower than what they put in.
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MegaForum
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| Posted: Thu Jul 03, 2008 1:08 pm Post subject: |
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| lurc wrote: | Make an array of integer's and then create a for loop.
Array:
int nNums[3];
For loop:
for ( initialize variables ; condition ; inc/dec/sleep/etc )
Then just do
cin >> nNums[i]; // if i was the number u initialized in your for loop. |
Can you explain the array a little better =x. I tried it but I get a warning saying " The variable 'nNums' is being used without being initialized."
Also to slovach : i use iostream.h because that's how its named in visual C++ 2008 to show its a header file. It uses iostream, but its labeld iostream.h
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Chaosis13
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| Posted: Thu Jul 03, 2008 1:09 pm Post subject: |
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Well... You shouldn't do a loop, unless it becomes a bigger, then a for loop.
| Code: | for(int x = 0; x = 3, x++){
//stuff
} |
And at end use var x and an if statement to say "You did it in " + x + " trys!" or "You couldn't guess it! Fuck you! It was 5!".
And you should make the number random each time.
Just some tips...
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lurc
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| Posted: Thu Jul 03, 2008 1:11 pm Post subject: |
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| MegaForum wrote: | | lurc wrote: | Make an array of integer's and then create a for loop.
Array:
int nNums[3];
For loop:
for ( initialize variables ; condition ; inc/dec/sleep/etc )
Then just do
cin >> nNums[i]; // if i was the number u initialized in your for loop. |
Can you explain the array a little better =x. I tried it but I get a warning saying " The variable 'nNums' is being used without being initialized."
Also to slovach : i use iostream.h because that's how its named in visual C++ 2008 to show its a header file. It uses iostream, but its labeld iostream.h |
If you wanna store 3 different numbers then you'll have to use an array.
If you just wanna check for the number, read HalfPrime's code.
Arrays are just simply multiple variables all built into a big table.
you can access each by placing an index between the square brackets [ ]
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MegaForum
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| Posted: Thu Jul 03, 2008 1:13 pm Post subject: |
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| HalfPrime wrote: | add "#include <windows.h>" to give you access to the clock() function. This is one of the functions used to generate random numbers. It returns how long the program has been open for.
the mod operator "%" returns the remainder of a division between 2 numbers. ie 13%4 would return 1 as 13 is 1 more than 12(4*3). You can use this to get a number from 1-99 from clock(). mynumber=(clock()%99)+1.
If you look at your source, you repeat that block of code 3 times. This is an excellent place for a loop. a for loop is just a while loop that does some extra stuff automatically for you.
| Code: | for(int tries=1;tries <=3;tries++){
cout <<"Enter number" << tries << endl;
cin >> number;
if(number == mynumber)
{
cout <<"You got my number correct!"<< endl;
break;
}
else if(number != mynumber)
{
cout <<"Your number is incorrect!"<< endl;
}
} |
The for loop will repeat from 1 to 3 taking in a number and comparing it to the random number. if they're equal, it'll say you win and "break;". This means it will break out of the for loop and go down to the system("PAUSE") and return. if they're not equal, it will say that and start the loop again.
Once you understand this and want to improve, try seeing if you can tell them whether the number is higher or lower than what they put in. |
Ty for the help, very appreciated.
Edit: I'm getting an error saying ' error C3861: 'clock': identifier not found'
Any idea why?
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HalfPrime
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| Posted: Thu Jul 03, 2008 1:23 pm Post subject: |
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try Clock() instead of clock(). and make sure you have the (). It's a function, not just a variable.
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hcavolsdsadgadsg
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| Posted: Thu Jul 03, 2008 1:25 pm Post subject: |
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| MegaForum wrote: |
Any idea why? |
Just use rand() and seed it with GetTickCount() or something.
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MegaForum
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| Posted: Thu Jul 03, 2008 1:26 pm Post subject: |
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| HalfPrime wrote: | | try Clock() instead of clock(). and make sure you have the (). It's a function, not just a variable. |
Nope same error except says 'Clock'. Also , should i have declaired it as an int as so
| Code: |
int mynumber=(Clock().%99)+1;
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and then fill in each spot where its comparing the two, put mynumber?
Edit: slovach says: Just use rand() and seed it with GetTickCount() or something
No idea what that is Just because I'm getting back into it, doesn't mean I know all the available concepts XD
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Flyte
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| Posted: Thu Jul 03, 2008 3:19 pm Post subject: |
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| Code: | #include <windows.h>
#include <iostream>
void main( void )
{
int random, i, guess;
//-------
srand( GetTickCount() );
random = rand()%99 + 1;
std::cout << "You have 3 tries to guess the number! Begin..." << std::endl;
for( i = 0; i < 3; i++ ) {
std::cout << "Guess " << i+1 << ": ";
std::cin >> guess;
if( guess > random ) std::cout << "Too high!" << std::endl;
else if( guess < random ) std::cout << "Too low!" << std::endl;
else break;
}
std::cout << ((i == 3) ? "You lose!" : "You win!") << std::endl;
std::cin.sync();
std::cin.ignore();
}
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Noz3001
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| Posted: Thu Jul 03, 2008 3:38 pm Post subject: |
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| why not use srand(time(0));? Then you don't need windows.h
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Flyte
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| Posted: Thu Jul 03, 2008 3:40 pm Post subject: |
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| noz3001 wrote: | | why not use srand(time(0));? Then you don't need windows.h |
Then you need to include ctime, and windows.h is a far more common header.
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Noz3001
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| Posted: Thu Jul 03, 2008 4:46 pm Post subject: |
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| Flyte wrote: | | noz3001 wrote: | | why not use srand(time(0));? Then you don't need windows.h |
Then you need to include ctime, and windows.h is a far more common header. |
windows.h is bigger and is OS dependant.
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