#include <stdio.h>
#include <string.h>
#include<stdlib.h>
#include <ctype.h>
#define FILENAME "file.txt"
 
int main(void)
{
  char record[100],                    /* array to hold lines */ 
       *fld1, *line,*kk;                  /* pointers to lines */
  FILE *fin;                               /* pointer to input file */  
  int g,i;                                   /* some integers... */
  fin = fopen(FILENAME, "r");    /* open the file to read */
 
 
  while (fgets(record, sizeof(record), fin))
  {
    if (record[strlen(record) - 1] != '\n')
      record[strlen(record) - 1] = '\n';          //until new line
      line = strtok(record, "\n");                  //now we have a line to work with...
 
     i = 0;
     g =  strlen(line);
 
// this part of program should delete first number if there s one like : 33 dd to :dd   
 
  while( isdigit(line[i]))               
         {            
                line[i]= line[i+1]  ;   //somethings wrong... :(                  
                i=i+1;
         }
 
 
              // Ideas ?
 
 
 
    printf("%s\n", line);
  }     
  fclose(fin);
  system("Pause");
  return 0;
}

int main()
{
    char line[] = "333 hou 23se 444 bi 4g";
    char buf[100] = {0};
    char *p1 = line;
    char *p2 = buf;
    while( *p1 )
    {
        // use temp pointer to locate
        // end of digits
        char* p3 = p1;
        while( isdigit(*p3) )
            p3++;
        // is there a space following the digits ?
        if( *p3 == ' ')
            // yes, then skip the space and move on to the next char
            p1 = p3+1;
        else
        {
            // no, then was the last char put into temp buffer
            // a space
            if( *(p2-1) == ' ')
                // yes, then overwrite that space with a new character
                p2--;
            p1 = p3;
        }
        // copy all characters up to the next digit
        while(*p1 && !isdigit(*p1) )
            *p2++ = *p1++;
    }
 
    return 0;
}

void AD(char * record, char * record_out)
{
    char *p1 = record;
    char *p2 = record_out;
 
    // Rest of the original code here ...
}

// In your main(), the while loop
while (fgets(record, sizeof(record), fin))
{
    // A buffer local to the while() loop, of same size as the record array
    char record_out[sizeof(record)] = {0};
 
    // Process the line
    AD(record, record_out);
 
    // Display what we got
    puts(record_out);
}