strtol - C stdlib.h

C examples for stdlib.h:strtol

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Type

function

From 


<cstdlib>
<stdlib.h>

Description

Convert string to long integer of the specified base to a long int value.

Prototype 

long int strtol (const char* str, char** endptr, int base);

Description

Parameters

Parameter Description
str C-string representation of an integral number.
endptr type char* set by the function to the next character in str after the numerical value.
base Numerical base (radix)

Return Value

On success, the function returns the converted integral number as a long int value.

For non valid conversion, a zero value is returned (0L).

For out of the range values, the function returns LONG_MAX or LONG_MIN (defined in <climits>), and errno is set to ERANGE.

Demo Code


#include <stdio.h>
#include <stdlib.h>

int main ()// www. j  ava2s .  co m
{
  char str[] = "2020 60c0c0 -1010101010101010101010 0x6f1234";
  char * pEnd;
  long int li1, li2, li3, li4;
  li1 = strtol (str,&pEnd,10);
  li2 = strtol (pEnd,&pEnd,16);
  li3 = strtol (pEnd,&pEnd,2);
  li4 = strtol (pEnd,NULL,0);
  printf ("%ld, %ld, %ld %ld.\n", li1, li2, li3, li4);
  return 0;
}

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