langc_strtok_strpbrk.c

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

int getStrlens(char str[])
{
	int cnt=0;
	
	while(str[cnt] !='\0')
		cnt++;
	
	return cnt;
}

int main(void) {
	int lens1,lens2;
	char *str1="123456789"; 						// only  read  
	char str2[]="my name is   jeong   *hun lee this-is*number 123-4568";	// read, writable
	char str3[]="my name is   jeong   *hun lee this-is*number 123-4568";	// read, writable 
	
	char *ptr;
	
	lens1 = getStrlens(str1);
	lens2 = strlen(str1);
	
	printf("strlens %d , %d \n",lens1,lens2);
	
	//*(str1+1)=0; if you changed , error 
	
	/*	1. check str2 and delimeters 
	 	2. replaced only one charater in str2 with one of the delimeters 
	 	3. made 1st word and return 1st word 
	*/
	
	printf("TEST1 strtok ----------------------\n");
	
    ptr = strtok( str2, " *-"); 
    
    do{
    	printf( "%s\n",ptr);	
    
	/*	1. check NULL and delimeters, NULL means same string. 
	 	2. replaced only one charater in str2 with one of the delimeters 
	 	3. made it 2nd word and return 2st word 
	*/
    }while( (ptr=strtok( NULL, " *-")) ); 
    
   /*
   		str2 was replaced with delimeters so it's different string
   		strtok changed NULL instead of delimeter 
   */
    printf( "%s\n",str2); 
    
    printf("TEST2 strpbrk ----------------------\n");
    
    ptr = strpbrk( str3, " *-");
    do{
    	printf("[%c]",*ptr);
    	printf("%s\n",(ptr+1));	
    }while( (ptr=strpbrk( ptr+1, " *-")) );     
    
    return 0;
}