Use C strtol function to convert string to long
Syntax
C strtol function has the following syntax.
long double strtol(const char * restrict start, char restrict ** restrict end);Header
C strtol function is from header file stdlib.h.
Description
C strtol function converts the string into a long and returns the result.
Example
Use C strtol function to convert string to long.
#include <stdio.h>
#include <stdlib.h>
/*from w ww. ja v a 2 s . co m*/
int main()
{
const char *string = "-1234567abc";
char *remainderPtr;
long x;
x = strtol( string, &remainderPtr, 0 );
printf( "%s\"%s\"\n%s%ld\n%s\"%s\"\n%s%ld\n",
"The original string is ", string,
"The converted value is ", x,
"The remainder of the original string is ",
remainderPtr,
"The converted value plus 567 is ", x + 567 );
return 0;
}
The code above generates the following result.
