The wcstof() functions convert the initial portion of the wide-character string pointed to by str to a float point value. The str parameter points to a sequence of characters that can be interpreted as a numeric floating-point value. These functions stop reading the string at the first character that it cannot recognize as part of a number i.e. if the first character is any of any type except numbers the function terminates there only. This character can be the wchar_t null character at the end of the string.
The standard library functons beginning with ‘wcs’ are declared in wchar.h library in C.
Syntax :
float wcstof (const wchar_t* str, wchar_t** endptr); Parameters : str : C wide string beginning with the representation of a floating-point number. endptr : Reference to an already allocated object of type wchar_t*, whose value is set by the function to the next character in str after the numerical value. This parameter can also be a null pointer. Return value : 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 is returned.
// C code to convert string having // floating point as its content // using wcstof function #include <stdio.h> // header file containing wcstof function #include <wchar.h> int main() { // wide Character array to be parsed wchar_t str[] = L"58.152 9.26"; // Wide Character array to be parsed wchar_t* pEnd; // float variable to store floating point values float f1, f2; // Parsing the float values to f1 and f2 f1 = wcstof(str, &pEnd); f2 = wcstof(pEnd, NULL); f2 = 2 * f2; // Printing parsed float values of f1 and f2 wprintf(L"%.2f\n%.2f\n", f1, f2); // operation being performed on the values parsed wprintf(L"Value of Pie is %.2f .\n", f1 / f2); return 0; } |
Output:
58.15 18.52 Value of Pie is 3.14 .
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