Dabbling with C

[Andy-H]

I am trying to get this C code to run but keep getting the compiler errors

C:\Documents and Settings\andrew\Desktop>g++ checksum.c -o checksum
checksum.c:33:19: warning: character constant too long for its type
checksum.c:7:19: error: variable or field 'calcchecksum' declared void
checksum.c:7:19: error: '_UCHAR' was not declared in this scope
checksum.c:7:31: error: '_UINT' was not declared in this scope
checksum.c:7:38: error: 'csum' was not declared in this scope

 

 

C is not my language of choice but I need to get this code working and convert it to PHP, currently I have the following, but need a C implementation working to check if it returns the expected result ( Note: the C code is not mine, it's from some documentation, I only coded the main function and added the includes, these _UCHAR datatypes don't seem to be used too often?

 

 

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


#define   SMSCHECKBEGIN 0x6c5a
#define   REQSMSSIZE		98
void calcchecksum(_UCHAR inb, _UINT *csum)
{
for (int i = 0; i < 8; ++i) {
	if (*csum & 1) {
		*csum >>= 1;
		if (!(inb & 1)) *csum ^= 0x8408;
	} else {
		*csum >>= 1;
		if (inb & 1) *csum ^= 0x8408;
	}
inb >>= 1;
}
}


_UINT getchecksum(_UCHAR *ind)
{
_UINT csum = SMSCHECKBEGIN;
for(int i = 0; i < REQSMSSIZE - 2; ++i)
	calcchecksum(ind[i], &csum);


ind[REQSMSSIZE - 2] = (_UCHAR)(csum & 0xff);
ind[REQSMSSIZE - 1] = (_UCHAR)((csum >>  & 0xff);
return csum;
}
int main(int argc, char *argv[])
{
   char check[] = '12820000000A5907010F000B817087267041F8000000000B817087267041F80000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000FFFFFF068B\0';
   std::out(getchecksum(check));
}
[/i]