Please explain why ?

[Sanjeev]

Output of followin program at Turbo C++ 3.0 is 7 ( Not 2 or 3).

Please explain why ?

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

void main()
{
char ch[]={'a','b'};

int len;
len=strlen(ch);

printf("%d\n",len);
}
////////////////////////////////////////////////

 

[Allan Bruce]

Output of followin program at Turbo C++ 3.0 is 7 ( Not 2 or 3).

Please explain why ?

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

void main()
{
char ch[]={'a','b'};

int len;
len=strlen(ch);

printf("%d\n",len);
}
////////////////////////////////////////////////

This is actually undefined, since ch is an array of chars but is not null
terminated, if you had
char ch[] = "ab";
or
char ch[] = {'a','b','\0'};
then this would be fine and you would get your expected result
Allan

 

[Victor Bazarov]

Output of followin program at Turbo C++ 3.0 is 7 ( Not 2 or 3).

Please explain why ?

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

void main()
{
char ch[]={'a','b'};

int len;
len=strlen(ch);

printf("%d\n",len);
}
////////////////////////////////////////////////

This is actually undefined, since ch is an array of chars but is not null
terminated, if you had
char ch[] = "ab";
or
char ch[] = {'a','b','\0'};
then this would be fine and you would get your expected result
Allan

Absolutely! Another reason why it's undefined is because the 'main'
function does not return 'int' (as it's supposed to).

Victor

 

[Aggro]

Output of followin program at Turbo C++ 3.0 is 7 ( Not 2 or 3).

You have posted this guestion to C++ and C groups. Please deside what
language you are learning. Is it C or is it C++? ( They are not the same
language )