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sprintf problems

Discussion in 'C' started by susmatt, Nov 17, 2007.

  1. susmatt

    susmatt New Member

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    I am getting this error (make.exe: *** [goodcode.elf] Error 1), with the following code. . I was hoping someone might be able to help me figure out what might be wrong.one as well. Here is the code:
    Code:
    float magX[N];
    % my x[k] is a structure with .re and .im parts
    for(k=0; k<N; k++) {
        magX[k] = sqrt(X[k].re*X[k].re + X[k].im*X[k].im)/N;
    }
    % error is in one of the following lines of code    
    % n is defined as int
    for(k=0; k<N; k++) {
        n=sprintf((char *)str,"AD0 %4e",magX[k]);
        serXmit1((unsigned char *)str,n);
    }
    
    
    If I comment out the second for loop, I don't get an error. I am trying to print the magnitude of my FFT result to the screen so that I can double check with Matlab to be sure it is working correctly. I suspect the problem has to do with variable type, but as far as I can tell this code should be correct. I have also tried %4f in place of the %4e with no luck. Any help would be much appreciated. Thanks.

    Susan
     
    Last edited by a moderator: Nov 17, 2007
  2. shabbir

    shabbir Administrator Staff Member

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    I don't understand the lines like
    Code:
    % my x[k] is a structure with .re and .im parts
     
  3. Salem

    Salem New Member

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    Please don't PM me for 1:1 support.
    Telling us how you declared 'str' as well would be a bonus.
     

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