Noob Q 2D array processing

[naildirt]

I am unable to check if the character in the 2D array isalpha

here is my code
#include<iostream>
#include<cctype>
#include<cassert>
#include<cstring>
const int maxChar = 20 ;
using namespace std ;
int main()
{
int count = 0 ;

char d[2][20] = { "hi" , "di" } ;


for(int r = 0 ; r < 2 ; r++)
{
cout << "loop1 " ;
for ( int c = 0 ; c != '\0' && c < 20 ; c++)
{

if (isalpha( d[r][c]))
{

cout << d[r][c] ;
}
else
cout << "nooooooo " ;



}
count++ ;

}
cout << "\n count is" << count ;

}

[naildirt]

More info : my inner loop isnt executing. why?

[GCDEF]

for (int c = 0 ; c != '\0'...

What do you think that's going to do? You set c to zero, then execute the loop as long as c is not equal zero.

[naildirt]

I thought that the 2nd statement is a conditional statement, meaning it does not assign value to c but just checks? am I correct?

[VictorN]

More info : my inner loop isnt executing. why?

You have to debug your code to see what happens with your variables and why this loop "isnt executing" (if it really is not executed!)

[naildirt]

The error is in the conditional statement of the second for loop. If I used the strnlen function, I dont get any trouble

[VictorN]

...
int main()
{
	int count = 0 ;
	char d[2][20] = { "hi" , "di" } ;
	...
}

What type of data is this char d[2][20] supposed to contain?
Do you know that "c string" must be NULL-terminated?

[naildirt]

The type of data is char. I thought when I initialize char d[] = "hi", the size is 3, meaning the compiler automatically adds a null character to the end

[GCDEF]

The error is in the conditional statement of the second for loop. If I used the strnlen function, I dont get any trouble

I don't know how much more clearly to explain it. You set c to zero, then execute the loop while c is not zero. Of course it won't execute.