program create folders and transfer files into them

I have 100 text files from A001 to A100, each file only contain a short string. I 'd like to know how to write a program to count the frequency of 'C', and create folders with filename_countvalue (like A100_12, A050_3, represent 12 and 3 of 'C' in A100 and A050), then sort file A100 to folder A100_12, etc. Could you tell me how to write the program? Thanks in advance.

What have you tried?

Code:

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int main()
{
        FILE *in, *out;
        int i,count;
        char ch,str[3], filename[5];

        for( i=1;i<100;i++)
              {......getfilename......
                if((in=fopen(filename,"r"))==NULL)
                continue;
                count=0;
                while(!feof(in))
                  {
                        ch=fgetc(in);
                        if (ch=='c')
                        count+=1;
                  }
                        sprintf(str,"%d",count);
                        mkdir(count,0777);
                      .........                .......               
                        fclose(in);
                fclose(ou);
                }
}

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after running, create a file named count, not filename_countvalue.
How to create folder with variables? Thanks.

Creating directories and moving files is operating system dependent. Assuming you're using a *nix flavour, you can use mkdir from <sys/stat.h>
mkdir

To move a file/folder you can use the function rename in <stdio.h>:
rename - C++ Reference

Quote:

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Originally Posted by Memloop

Creating directories and moving files is operating system dependent. Assuming you're using a *nix flavour, you can use mkdir from <sys/stat.h>
mkdir

To move a file/folder you can use the function rename in <stdio.h>:
rename - C++ Reference

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YES, I use linux fedora, why following program can't create folders 1-4:

Code:

---

int main()
 { int i;
    for (i=1,i<5,i++)
    mkdir(i,0777);
}

---

First of all, I suggest you add this to your profile:

Code:

---

alias gcc='gcc -ansi -pedantic -Wall -Wextra'

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The code you've shown doesn't include all the needed headers, and if you did try to compile the code with the compiler warnings enabled you would get a lot of hints as to why it's not working.

The first argument to mkdir is a char*, not an integer.