strings, pointers, messy..

[MPrestonf12]

What im trying to do is read a string of numbers in a textbox and if its a digit concatanate them together until I come to a "," then repeat the process. for example.. 56,77,13,66,843 it would read 5(its a digit) then 6(its a digit) then it will hit "," and move ahead to repaet the process. heres what I have anyone know a good functions to use or a few suggestions, thanks alot

char sztext[200];

retval = GetWindowText(gradebx,sztext,200);

char num[200][5];
int i;

for(i=0;i<size;i++)
{
	if(isdigit(sztext[i]))
	{
		strcat(num[i],sztext[i]);
	}
}

i get the error

strcat' : cannot convert parameter 2 from 'char' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe.

[Zaei]

You need to take the address of the character:

strcat(num[i], &sztext[i]);

Z.

[HarryW]

Well, not quite, cos sztext[ i ] will be one character in the middle of a string, and strcat is expecting a string, not a character. If you just give it the address, it will append the whole rest of the string until it hits a '\0' character.

You could do it with strncat(). strncat() will only concatentate a given number of characters, so you can tell it to only concatenate 1:

strncat(num[i], sztext[i], 1);

[jim mcnamara]

Try:

char sztext[200];
char *buf,*s;
int i,j;
char num[200][5];
memset(num,0x00,sizeof(num)); // string functions require trailing nulls
int retval = GetWindowText(gradebx,sztext,200);
buf=sztext;
j=0;
s=num[j];
// assuming sztext is null-terminated ....
while(*buf!=0x00)
{
	if(isdigit(*buf) )*s++=*buf;
                    if(*s==',') {
                           j++;                    
                           s=num[j];
                    }
                    buf++;
}

[Zaei]

Erm, sorry for not reading the post correctly =). At least it got people's attention =).

Z.