strtod

C/C++ Reference

strtod
Syntax:
  #include <cstdlib>
  double strtod( const char *start, char **end );

The function strtod() returns whatever it encounters first in start as a double. end is set to point at whatever is left in start after that double. If overflow occurs, strtod() returns either HUGE_VAL or -HUGE_VAL.

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