c_cpp 在const char **中使用strtod

Posted 2021-05-14

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

// Used strtod to extract number from string.

int num_is_int(double d)
{
  return d == floor(d);
}


int main(void)
{
  const char* tester = "1234-> out";
  char** moved; // This is used to store the new location of string.
  double result = strtod(tester, moved);
  printf("The result is %f,\n the moved string is %s\n", result, *moved);
  printf("Result is also int %d\n", num_is_int(result));
  return 0;
}