void strdelspc(char *p)
{
    char    *pfrom,*pto;
    
    pfrom = pto = p;
    
    while(1){
        if(*pfrom == '\0'){
            *pto = '\0';
            break;
        }
        else if(*pfrom == ' '){
            pfrom++;
        }
        else {
            *pto++ = *pfrom++;
        }
    }
}