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strtof, strtod, strtold cppreference.com
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strtof, strtod, strtold

cppreference.com
< c | string | byte
[]

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<stdlib.h>
float strtof( const char* str, char** str_end );
 ( C99)
double strtod( const char* str, char** str_end );
long double strtold( const char* str, char** str_end );
 ( C99)
, str.
:
Interprets a floating point value in a byte string pointed to by str.
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str_end . str_end NULL, .
:
The functions sets the pointer pointed to by str_end to point to the character past the last character interpreted. If str_end is NULL, it is ignored.
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str
:
pointer to the null-terminated byte string to be interpreted
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str_end
.
:
pointer to a pointer to character.
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, str . , HUGE_VAL, HUGE_VALF HUGE_VALL . , 0 .
:
Floating point value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and HUGE_VAL, HUGE_VALF or HUGE_VALL is returned. If no conversion can be performed, 0 is returned.
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C++ strtof, strtod, strtold
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