checking last char of string in c

Question

If I have two types of strings as:

const char *str1 = "This is a string with \"quotes escaped at the end\""; 
const char *str2 = "This is a \"string\" without quotes at the end"; 

testFn(str1);
testFn(str2);

int testFn(const char *str)
{
  // test & return 1 if ends on no quote
  // test & return 0 if ends on quote
  return;
}

I would like to test if the string ends with a quote " or not

What would be a good way of testing this? Thanks

Answer 1

int testFn(const char *str)
{
  return !str || !*str || str[strlen(str) - 1] != '\"';
}

Answer 2

Don't forget to make sure your string has at least 1 character:

int testFn(const char *str)
{
    return (str && *str && str[strlen(str) - 1] == '"') ? 0 : 1;
}

Answer 3

int testFn(const char *str)
{
  if(*str && str[strlen(str + 1)] == '"')
    return 0;
  else
    return 1;
}