atoi

[prasoon34881]

atoi() takes string as input and returns the integer.
atoi("234")=234.
u can use 234 as an integer now...

but what would be the result of
atoi(23 28 56)?
"23 28 56" is a string.


and what would be the way to get each 23, 28 and 56 as integers?
please reply with proper format.
asap...

[divideby0]

the function breaks on non-digits, so "23 28 56" would return 23; "123.45" would return 123; "abc" would return 0.

the second part would be to use something like strtok

char *p = strtok(num_string, " ");
 
while(p)
{
   int_var = atoi(p);
   // do something with int_var
   p = strtok(NULL, " ");
}

a side effect of strtok is that it modifies num_string. if you need its original value, then make a copy and manipulate the copy.

atoi returns 0 if the function fails for some reason. if 0 is a valid value for your program, you might consider using sscanf instead as it returns the number of properly converted items.

HTH