#include <stdlib.h>

#include <stdio.h>

#include <wchar.h>

#include <string.h>



/* 

 * This program concatenates two wide-character strings using

 * the wcscat function, and then manually compares the result

 * to the expected result.

 */



#define S1LENGTH 10

#define S2LENGTH 8



int main(void) {

	int i;

	wchar_t s1buf[S1LENGTH + S2LENGTH];

	wchar_t s2buf[S2LENGTH];

	wchar_t test1[S1LENGTH + S2LENGTH];

	

	/* Initialize the three wide-character strings */

	

	if (mbstowcs(s1buf, "abcmnexyz", S1LENGTH) == (size_t)-1) {

	   perror("mbstowcs");

	   exit(-1);

	}

	

	if (mbstowcs(s2buf, " orthis", S2LENGTH) == (size_t)-1) {	

	   perror("mbstowcs");

	   exit(-1);

	}

	

	if (mbstowcs(test1, "abcmnexyz orthis", S1LENGTH + S2LENGTH)  == (size_t)-1) {

	   perror("mbstowcs");

	   exit(-1);

	}

	

	/* 

	 * Concatenate s1buf with s2buf, placing the result into

	 * s1buf.  Then compare s1buf with the expected result 

	 * in test1.

	 */	

	wcscat(s1buf, s2buf);

	

	for (i = 0; i < S1LENGTH + S2LENGTH - 2; i++) {

	   /* Check that each character is correct */

	   if (test1[i] != s1buf[i]) {

		   printf("Error in wcscat\n");

		   exit(-1);

	   }

	}

	

	printf("Concatenated string: <%S>\n", s1buf);

}