strtof function in C
Last Updated :
22 Jul, 2019
Parses the C-string str(assumed) interpreting its content as a floating-point number (according to the current locale ) and returns its value as a float. If endptr(end pointer) is not a null pointer, the function also sets the value of endptr to point to the first character after the number.
Syntax:
strtof(const char* str, char **endptr)
Parameters:
str : String object with the representation of floating point number
endptr : Reference to an already allocated object of type char*,
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, in which case it is not used.
Return Value : On success, the function returns the
converted floating-point number as a value of type float.
#include <stdio.h>
#include <stdlib.h> // Header file containing strtof function
int main()
{
char array[] = "365.25 7.0" ;
char * pend;
float f1 = strtof(array, &pend);
float f2 = strtof(pend, NULL);
printf ( "%.2f\n%.2f\n" , f1, f2);
printf ( " One year has %.2f weeks \n" , f1 / f2);
return 0;
}
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Output:
365.25
7.0
One year has 52.18 weeks
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