how to store it

[zcrself]

file:

>chromosome01
CTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAA
CCCTAAACCCTAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACAGCT
GACAGTACGATAGATCCACGCGAGAGGAACCGGAGAGACAACGGGATCCAGGCGCCAGCG
ACGGATCCGGGCGAGAGGGGAGTGGAGATCATGGATCCGTGCGGGAGGGGAAGAAGTCGC
CGAATCCGACCCTCCCATCGCCATCGACAGTAGGTCTGCGCGAGAGGGGCACCGGCGCTG
>chromosome02
GCTCTGAGCGAGATGCAACGCCGGCCGGCTTGGAGAGTAACTCAAGAGAGACAGAATGGA
AGATAGAGAACAAGAGAGTGAGAGGATAAGGATATAGACCAGACCACACAATTTTCTCTT
CTTTTTAACTTTGTATTAAGATCTTTTATGGAACATCTTTTATTGTTGATATCAAAATAA
CTGAAACTTATACTTTAATATTTTTTGAGACAAAAAGTAACAATCGTAAAAAAAAGTTCC
>chromosome03
ACGAGAGTTACCCCACCACCCATGTCTCGAGCCGACCAGATCTGCCGCCCACGACCCGAG
TCATCGTTGGATCCACCACCCACAACCCGCGACCGAGCTACGCCTCCTGTGGATTGATGC
CACTGCCCTGAGCTTCACTGCCGGTACTGTCGCTCGCGACCCGAGCTCCGCCGCTGGTAC
CGTCGCCCACAACTCAAGCTGTGTTGCCACTAGAGAAAAAGGAGGCGAGAGCGAGGGCAA

Aiming at the file content above,I want to use pointer array to store it

    FILE *fp;
    fp = fopen("file1","r"); 
    char *pa[12];
    char *tmp;
    if(str[0] == '>')
        {
            
                  j = 0;
                  chr_num++;//chromosome count         
            
        }else{

             //format str  remove the last spaces 
             sscanf(str,"%s",tmp);
             
             //combine sequcences
              while(*tmp++ != '\0')
              {
                    // i++;
                     *(pa[chr_num]+j++) = *tmp;
                           
              }
              
        }
         
    } 
    fclose(fp);

data structure image:
http://202.127.18.228/s.jpg

[Sebastiani]

file:

>chromosome01
CTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAA
CCCTAAACCCTAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACCCTAAACAGCT
GACAGTACGATAGATCCACGCGAGAGGAACCGGAGAGACAACGGGATCCAGGCGCCAGCG
ACGGATCCGGGCGAGAGGGGAGTGGAGATCATGGATCCGTGCGGGAGGGGAAGAAGTCGC
CGAATCCGACCCTCCCATCGCCATCGACAGTAGGTCTGCGCGAGAGGGGCACCGGCGCTG
>chromosome02
GCTCTGAGCGAGATGCAACGCCGGCCGGCTTGGAGAGTAACTCAAGAGAGACAGAATGGA
AGATAGAGAACAAGAGAGTGAGAGGATAAGGATATAGACCAGACCACACAATTTTCTCTT
CTTTTTAACTTTGTATTAAGATCTTTTATGGAACATCTTTTATTGTTGATATCAAAATAA
CTGAAACTTATACTTTAATATTTTTTGAGACAAAAAGTAACAATCGTAAAAAAAAGTTCC
>chromosome03
ACGAGAGTTACCCCACCACCCATGTCTCGAGCCGACCAGATCTGCCGCCCACGACCCGAG
TCATCGTTGGATCCACCACCCACAACCCGCGACCGAGCTACGCCTCCTGTGGATTGATGC
CACTGCCCTGAGCTTCACTGCCGGTACTGTCGCTCGCGACCCGAGCTCCGCCGCTGGTAC
CGTCGCCCACAACTCAAGCTGTGTTGCCACTAGAGAAAAAGGAGGCGAGAGCGAGGGCAA

Aiming at the file content above,I want to use pointer array to store it

    FILE *fp;
    fp = fopen("file1","r"); 
    char *pa[12];
    char *tmp;
    if(str[0] == '>')
        {
            
                  j = 0;
                  chr_num++;//chromosome count         
            
        }else{

             //format str  remove the last spaces 
             sscanf(str,"%s",tmp);
             
             //combine sequcences
              while(*tmp++ != '\0')
              {
                    // i++;
                     *(pa[chr_num]+j++) = *tmp;
                           
              }
              
        }
         
    } 
    fclose(fp);

data structure image:
http://202.127.18.228/s.jpg

That code doesn't make much sense. Why don't you post a compilable program? Also, you need to allocate some memory to 'pa' - 12 pointers still == 0 available memory. Ditto for 'tmp'.

[zcrself]

That code doesn't make much sense. Why don't you post a compilable program? Also, you need to allocate some memory to 'pa' - 12 pointers still == 0 available memory. Ditto for 'tmp'.

how to allocate some memory to 'pa'?
char *pa[12] = (char *) malloc( 10000000);

[Sebastiani]

For a single pointer:

char *p = malloc(n);

For many:

char *pa[] = 
{
      malloc(n), 
      malloc(n), 
      malloc(n), 
      malloc(n), 
      malloc(n)
};

All that could be done in a loop, of course. And don't forget to free() what you malloc(). Also, it might be a good idea to read up on pointers as much as possible at this point.

[zcrself]

For a single pointer:

char *p = malloc(n);

For many:

char *pa[] = 
{
      malloc(n), 
      malloc(n), 
      malloc(n), 
      malloc(n), 
      malloc(n)
};

All that could be done in a loop, of course. And don't forget to free() what you malloc(). Also, it might be a good idea to read up on pointers as much as possible at this point.

I see!

Using of pointer is very difficult!
Do you have some books about introduction of pointers of C or C++?