"Mapping algorithm" - Can anyone help me please ...???

faisalnet5 · #1 30-Apr-2008, 10:16

My output File is having the following data:

"MFITRWLFSTNHKDIGTLYLLFGAWAGMVGTALSLLIRAELGQPGTLLG DDQIYNVIVTA
HAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFL LLLASSTVEA
GAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTIIN MKPPALTQYQ
TPLFVWSVMITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPIL YQHLFWFFGH
PEVYILILPGFGMISHIVTYYSGKKEPFGYMGMVWAMMSIGFLGFIVWAH HMFTVGLDVD
TRAYFTSATMIIAIPTGVKVFSWLATLHGGNIKWSPALLWALGFIFLFTI GGLTGIVLAN
SSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGGFVHWFPLFTGYTLNDLWA KIHFSIMFVG
VNMTFFPQHFLGLSGMPRRYSDYPDAYTTWNIISSIGSFISLTAVILMVF IIWEAFASKR
EVATVELTTTNIEWLYGCPPPYHTFEQPVFVKV
MASTNTNLQKAIDLASKAAQEDKAGNYEEALQLYQHAVQYFLHVVKYEAQ GDKAKQSIRA
KCTEYLDRAEKLKEYLKKKEKKPQKPVKEEQSGPVDEKGNDSDGEAESDD PEKKKLQNQL
QGAIVIERPNVKWSDVAGLEGAKEALKEAVILPIKFPHLFTGKRTPWRGI LLFGPPGTGK
SYLAKAVATEANNSTFFSISSSDLVSKWLGESEKLVKNLFQLARENKPSI IFIDEIDSLC
GSRSENESEAARRIKTEFLVQMQGVGVDNDGILVLGATNIPWVLDSAIRR RFEKRIYIPL
PEAHARAAMFRLHLGSTQNSLTEADFQELGRKTDGYSGADISIIVRDALM QPVRKVQSAT
HFKKVRGPSRADPNCIVNDLLTPCSPGDPGAIEMTWMDVPGDKLLEPVVS MWDMLRSLSS
TKPTVNEQDLLKLKKFTEDFGQEG"

If u look carefully then u can see that there are two sequences. My code is as follows......what i am trying to do is, i already defined an array called: ngram [] = "FITRW".....when my code will run it should take my array and map with the first sequence.....if it gets any match then will print something and then after having done with the first one it will go to the second sequence and will do the same till my file ends....Can any one tell me in my code, where i am doing the mistake......Please help me....Regards !!!

CPP / C++ / C Code:

#include<stdio.h>
#include<conio.h>
#include<string.h>

int main (){

 FILE *open;
 
 char *pch;
 char pSequence[500];
 char ngram [] = "FITRW";
 
 open=fopen("output.txt", "r");
 
 while (fscanf(open, "%s", &pSequence) != EOF) {
       
       if (pSequence == '\0'){
                     
           printf("I am here\n");          
           pch = strstr(pSequence, ngram);
       
           while (pch != NULL)
           {
             printf("Found at %d\n", pch-pSequence+1);
             pch = strstr(pch+1, ngram);
           }
       }
       
 printf("\n%s", &pSequence);
 
 }
 
 return 0;   
    
}

----Faisal

L7Sqr · #2 30-Apr-2008, 11:50

CPP / C++ / C Code:

char pSequence[500];

Could become

CPP / C++ / C Code:

char pSequence[500] = {0};

So you can be sure that you have null values in the array.

CPP / C++ / C Code:

if (pSequence == '\0')

can then become

CPP / C++ / C Code:

if (pSequence[0] != 0)

Also, fscanf returns the number of items assigned, so you may want to check for != 0, instead of != NULL

faisalnet5 · #3 30-Apr-2008, 12:46

Hi...L7Sqr....thanks a lot for ur reply. By the way i have done those changes which u did mention to me but then the output is coming as follows:

================================================== ====

E:\BlackBox\CS Research\C-Coding\Software>map
MFITRWLFSTNHKDIGTLYLLFGAWAGMVGTALSLLIRAELGQPGTLLGD DQIYNVIVTA
Found at 2
HAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFL LLLASSTVEA
GAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTIIN MKPPALTQYQ
TPLFVWSVMITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPIL YQHLFWFFGH
PEVYILILPGFGMISHIVTYYSGKKEPFGYMGMVWAMMSIGFLGFIVWAH HMFTVGLDVD
TRAYFTSATMIIAIPTGVKVFSWLATLHGGNIKWSPALLWALGFIFLFTI GGLTGIVLAN
SSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGGFVHWFPLFTGYTLNDLWA KIHFSIMFVG
VNMTFFPQHFLGLSGMPRRYSDYPDAYTTWNIISSIGSFISLTAVILMVF IIWEAFASKR
EVATVELTTTNIEWLYGCPPPYHTFEQPVFVKV
MASTNTNLQKAIDLASKAAQEDKAGNYEEALQLYQHAVQYFLHVVKYEAQ GDKAKQSIRA
KCTEYLDRAEKLKEYLKKKEKKPQKPVKEEQSGPVDEKGNDSDGEAESDD PEKKKLQNQL
QGAIVIERPNVKWSDVAGLEGAKEALKEAVILPIKFPHLFTGKRTPWRGI LLFGPPGTGK
SYLAKAVATEANNSTFFSISSSDLVSKWLGESEKLVKNLFQLARENKPSI IFIDEIDSLC
GSRSENESEAARRIKTEFLVQMQGVGVDNDGILVLGATNIPWVLDSAIRR RFEKRIYIPL
PEAHARAAMFRLHLGSTQNSLTEADFQELGRKTDGYSGADISIIVRDALM QPVRKVQSAT
HFKKVRGPSRADPNCIVNDLLTPCSPGDPGAIEMTWMDVPGDKLLEPVVS MWDMLRSLSS
TKPTVNEQDLLKLKKFTEDFGQEG
================================================== ====

If u see the output then will realize that it is just reading the lines, then whenever it is getting the first match then stoped.....and not implementing the mapping algo. to the rest of the sequences it is reading from the file.....

Any idea what to do?

-----> Faisal

L7Sqr · #4 30-Apr-2008, 14:14

what mapping algorithm?
The string you are looking for only appears once within that file. You found it.
Your code says to print and then find the next one. If there is no next one, you exit the program.

faisalnet5 · #5 30-Apr-2008, 14:52

Do u know what.....i am totally SUCKS today......

Thanks a lot....u r right......!!! I am doing the right thing but saying it is wrong......What the........i really heat this bullshit programming life

Thanks again man.....it took my whole day.......!!!

God bless u....

Peter_APIIT · #6 06-May-2008, 17:29

I don't understand where you got two sequences of the output.

Please explain.

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"Mapping algorithm" - Can anyone help me please ...???

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Re: "Mapping algorithm" - Can anyone help me please ...???

Re: "Mapping algorithm" - Can anyone help me please ...???