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conversions

Discussion in 'C' started by transfernly, Dec 22, 2009.

  1. transfernly

    transfernly New Member

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    hi everyone...


    this is my code

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

    int main() {
    char str[] = "9960z3yu87";
    printf("str: %d\n", atoi(str));
    }



    here the output is 9960



    but my problem is when i give an input like this char str[] = "9960787897z3yu87"


    the out put is some garbage value....


    but i need my output to be as it is in " "

    that is "989898"
    output:
    989898


    "98765746474444"

    output:
    98765746474444


    in this way...i think you understood wat i mean....
    help me out...thank you all
     
  2. techgeek.in

    techgeek.in New Member

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    Code:
    # include<stdio.h>
    # include<conio.h>
    # include<stdlib.h>
    
    void main()
    {
    
    char str[]="9960787897z3yu87";
    clrscr();
    
    printf("int: %.0f\n",atof(str));
    getch();
    }
    

    The above code works perfectly. Actually, u obviously get the garbage value because the conversion value crosses the highest bound of integer. If u cnt understand the code then ask me.
     
    Last edited by a moderator: Dec 22, 2009
  3. transfernly

    transfernly New Member

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    thank you its working......can you explain me about it in detail...i tried google...but couldn't find it:nonod:


    thank you
     
  4. techgeek.in

    techgeek.in New Member

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    yah of course...look in c "int" takes 2 bytes i.e 16 bits..nd the max positive it can hold is from 0 to 65535. But float takes 4 bytes i.e 32 bits. The range of numbers increases. Thatz why i used "atof" instead of "atoi" and the format specifier used is "%f" instead of "%d". Now u know that the floating point numbers holds decimal point, then how r u getting the pure integer number in my above code? the reason is that in the format specifier "%f" u can specify the precision i.e number of places after decimal. e.g:- if u write %.3f then u get something like this 23.000(say) if u write %.2f then 23.00 if %.1f then 23.0 nd if %.0f then 23. I hope u have understood evrything
     
  5. shabbir

    shabbir Administrator Staff Member

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    Please use CodeBlocks when using Code in posts
     
  6. techgeek.in

    techgeek.in New Member

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    sorry! next time i wnt do this mistake...
     
  7. transfernly

    transfernly New Member

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    Code:
    # include<stdio.h>
    # include<conio.h>
    # include<stdlib.h>
    
    void main()
    {
    
    char str[]="9960787897z3yu87";
    clrscr();
    
    printf("int: %.0f\n",atof(str));
    getch();
    }
    


    This is ok...but i want to store the "str" value.....if i store it into float again am getting a garbage value.....and even tried in long......
    so whats that i need to do now.....

    thanq all
     
  8. techgeek.in

    techgeek.in New Member

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    sorry..not getting u!!.plzz cn u explain me with examples what r u trying to say??
     
  9. transfernly

    transfernly New Member

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    Code:
    str[]="987649574954bvkfvbf";
    
    printf("%.0f",atof(str));
    
    this was ur code....now i tried storing

    Code:
    int x=atof(str);
    long x=atof(str);
    float x=atof(str);
    


    when i try to print these values


    it gives me a garbage value......
     
  10. techgeek.in

    techgeek.in New Member

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    why r u getting garbage value?? I did this just check it out...
    Code:
    # include<stdio.h>
    # include<conio.h>
    # include<stdlib.h>
    
    void main()
    {
    
    char str[]="9960787897z3yu87";
    float x;
    clrscr();
    x=atof(str);
    printf("int: %.0f\n",x);
    getch();
    }
    
     
  11. transfernly

    transfernly New Member

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    check out the out put is
    9960787968
     
  12. techgeek.in

    techgeek.in New Member

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    Code:
     # include<stdio.h>
    # include<conio.h>
    # include<stdlib.h>
    
    void main()
    {
    
    char str[]="9960787897z3yu87";
    double x;
    clrscr();
    x=(double)atof(str);
    printf("int: %.0lf\n",x);
    getch();
    }
    
    
    sorry..now i have modified it and itz working
    output is:-9960787897
     

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