strtoul, wcstoul

Remonter à Stdlib.h - Index

Header File

stdlib.h

Category

Conversion Routines, Math Routines

Prototype

unsigned long strtoul(const char *s, char **endptr, int radix);

unsigned long wcstoul(const wchar_t *s, wchar_t **endptr, int radix);

Description

Converts a string to an unsigned long in the given radix.

strtoul operates the same as strtol, except that it converts a string str to an unsigned long value (where strtol converts to a long). Refer to the entry for strtol for more information.

Return Value

strtoul returns the converted value, an unsigned long, or 0 on error.

Example

 #include <stdlib.h>
 #include <stdio.h>
 int main(void)
 {
    char *string = "87654321", *endptr;
    unsigned long lnumber;
    lnumber = strtoul(string, &endptr, 10);
    printf("string = %s  long = %lu\n",
    string, lnumber);
    return 0;
 }

Portability

	POSIX	Win32	ANSI C	ANSI C++
strtoul	+	+	+	+
wcstoul		+	+	+