Adding numbers to a random number

This is a discussion on Adding numbers to a random number within the C++ Programming forums, part of the General Programming Boards category; Hi, i am new to C++. So can anyone help me? I am trying to do some math( either add ...

  1. #1
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    Adding numbers to a random number

    Hi, i am new to C++. So can anyone help me? I am trying to do some math( either add or multiply) a number to a random generated float( one between 0-0.9999) so it gives an output somewhere between 1-6, i have managed to create the random mumber generated but no matter what i do i cant get the desired output.

  2. #2
    C++まいる!Cをこわせ! Elysia's Avatar
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    Show your code.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  3. #3
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    Code:
    
    #include
     
     
     
    <stdio.h>
    
     
    #include
     
     
     
    <stdlib.h>
    
     
    #include
     
     
     
    <time.h>
    
     
    #include
     
     
     
    <conio.h>
    
    
     
    float
     
     
     
     getRand() {
    
     
        
     
     
    return rand() / (RAND_MAX+1.0);
    
     
    }
    
    
     
     
    
     
    int
     
     
     
     main() {
    
     
        srand( time(NULL) );
    
     
        getRand(); 
    
     
    	
     
     
    float number = getRand();
    
     
        printf(
     
     
    "Random number: %f\n", number);
    
     
    	getchar();
    
     
    	
     
     
    int number1;
    
     
        
     
     
    int value;
    
     
    	printf(
     
     
    "enter a number between 1 and 6 \n");
    
     
        scanf(
     
     
    "&i", &number1);
    
     
    	value= number1+number;
    
     
    	printf(
     
     
    "number: %i\f\n", value);
    
     
    	getchar();
    
     
    	getchar();
    
     
    	getchar();
    
     
    }
    



  4. #4
    C++まいる!Cをこわせ! Elysia's Avatar
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    You seem to be using C, not C++. It would be helpful if you posted in the right section next time.
    Also remove the excessive whitespace.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  5. #5
    Programming Wraith GReaper's Avatar
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    Multiply "number1" by "number" instead of adding them, for starters. The output for 1 to 6 will be -6.0f to something slightly smaller than 6.0f
    Devoted my life to programming...

  6. #6
    and the hat of wrongness Salem's Avatar
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    Turn off whatever crappy formatter you have, and just paste plain text.

    This is all the rubbish your "formatter" generated.
    #include
    [/COLOR ][/SIZE ][/FONT ]
    [/COLOR ][/SIZE ][/FONT ]
    [/COLOR ][/SIZE ][/FONT ]
    [FONT=Consolas ][SIZE=2 ][FONT=Consolas ][SIZE=2 ] [/SIZE ][/FONT ][/SIZE ][/FONT ][FONT=Consolas ][SIZE=2 ][COLOR=#a31515 ][FONT=Consolas ][SIZE=2 ][COLOR=#a31515 ][FONT=Consolas ][SIZE=2 ][COLOR=#a31515 ]<stdio.h>[/COLOR ][/SIZE ][/FONT ][/COLOR ][/SIZE ][/FONT ][/COLOR ][/SIZE ][/FONT ]
    [FONT=Consolas ][SIZE=2 ][COLOR=#a31515 ][FONT=Consolas ][SIZE=2 ][COLOR=#a31515 ][FONT=Consolas ][SIZE=2 ][COLOR=#a31515 ]
    [/COLOR ][/SIZE ][/FONT ][/COLOR ][/SIZE ][/FONT ][/COLOR ][/SIZE ][/FONT ][FONT=Consolas ][SIZE=2 ][COLOR=#0000ff ][FONT=Consolas ][SIZE=2 ][COLOR=#0000ff ][FONT=Consolas ][SIZE=2 ][COLOR=#0000ff ]
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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