Question

Which C99 function can be used to convert a string to a double?

Answer 1

Answer:

atof

Explanation:

atof function is used to convert a string to a double.

It takes a single parameter of type const char * and returns a double value.

The function signature is: double atof (const char* str);

In order to use this function in the code, you need to include the header file <stdlib.h>

For example:

#include <stdio.h>

#include <stdlib.h>  

int main()

{

   char str[5] = "0.01";

   double d = atof(str);

   printf("Value = %f\n", d);

   return 0;

}