what function can delete a space in a string?

void delspace (char *Str)
{
int Pntr = 0;
int Dest = 0;
 
while (Str [Pntr])
{
if (Str [Pntr] != ' ')
	Str [Dest++] = Str [Pntr];
Pntr++;
}
 
Str [Pntr] = 0;
}

extern char* delete_space_from_string ( char  *string /* I */  )
{
 
char space_token[] = " ";
char *temp_string  = NULL;
char *temp_result  = NULL;
 
if ( string == NULL || *string == NULL )
    {
    return( temp_string );
    }
 
/* delete space */    
 
temp_result = strtok( strip_ending_whitespace( string ), space_token );
 
temp_string = temp_result;
 
while( temp_result != NULL )
    {
    temp_result = strtok( NULL, space_token );
 
    if ( temp_result == NULL )
        {
        break;
        }
 
    temp_string = sprintf("%s%s",temp_string,temp_result);
    }
 
free(temp_result);
 
return( temp_string );
 
}

if ( string == NULL || *string == '\0' )

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
 
void remSpaces(char *ch){
    char *ch2 = ch;
    int i,j=0;
 
    for(i=0;i<=strlen(ch);i++){
        if(ch[i]!=' '){
            ch2[j] = ch[i];
            j++;
        }
    }
    printf(ch2);
}
 
int main()
{
    char *ch = malloc(256);
    printf("Enter your text :\n");
    gets(ch);
    remSpaces(ch);
    return 0;
}

Str [Dest] = 0;
/*
This would put the null right after the condensed text.
*/

Str [Pntr] = 0;
/*
This would put the null at the spot it was originally at ... not what you want as it leaves behind what ever chars that were not covered up by the chars that were moved.
*/