strtol

Syntax

#include <stdlib.h> long strtol(const char *s, char **endp, int base);

Description

This function converts as much of s as looks like an appropriate number into the value of that number. If endp is not a null pointer, *endp is set to point to the first unused character.

The base argument indicates what base the digits (or letters) should be treated as. If base is zero, the base is determined by looking for 0x, 0X, or 0 as the first part of the string, and sets the base used to 16, 16, or 8 if it finds one. The default base is 10 if none of those prefixes are found.

Return Value

The value.

Portability

ANSI/ISO C	C89; C99
POSIX	1003.2-1992; 1003.1-2001

Example

printf("Enter a number: "); fflush(stdout); gets(buf); char *bp; printf("The value is %d\n", strtol(buf, &bp, 0));