make a string empty in C

[sagar474]

I need to keep this string empty every time i execute the loop.

I done this to do so.

    
while(some_cond)
    {
    string=(char *)malloc(20);
while(cond)
{
    string[index]=assigne_something;
++index;
}
    }

but I think it is a bad idea. Is there any better idea to do it

[quzah]

You could use calloc, but all that does is loop through it for you. Either way you are still doing the same thing. But your malloc should be outside of that loop:

char *s = NULL;
s = malloc( size );
if( s )
{
    int x;
    for( x = 0; x < size; x++ )
        s[ x ] = '\0';
}

That and calloc effectively do the same thing.


Quzah.

[CommonTater]

The easy way to make a string empty is this...

char string[100000];

string[0] = 0;  // good as empty

[sagar474]

You could use calloc, but all that does is loop through it for you. Either way you are still doing the same thing. But your malloc should be outside of that loop:

char *s = NULL;
s = malloc( size );
if( s )
{
    int x;
    for( x = 0; x < size; x++ )
        s[ x ] = '\0';
}

That and calloc effectively do the same thing.


Quzah.

no every time i execute the string should have empty I up edited the code.
sorry it's my fault.