gistfile1.h

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

/*
Write a C routine with the following prototype:

  void condense_by_removing(
      char *z_terminated ,
      char char_to_remove
      );

Your routine should modify the given zero-terminated string in place,
removing all instances of the given char.
*/
void cbr(char *z , char cr)
{
  char *tmp;
  int i,j;

  tmp = (char *) malloc(sizeof(char) * sizeof(z));

  for(i=0,j=0; i<strlen(z); i++) {
    if (z[i]!=cr) {
      tmp[j]=z[i];
      j++;
    }
  }
  strcpy(z, tmp);
  free(tmp);
}

int main(int argc, char **argv)
{
  char *foo;
  
  foo = (char *) malloc(2000 * sizeof(char));
  strcpy(foo, argv[1]);
  foo[strlen(foo)]='\0';

  fprintf(stderr, "before: %s\n", foo);
  cbr(foo, '_');
  fprintf(stderr, "after : %s\n", foo);

  free(foo);
  return 0;
}