strtol c

1// definition: long int strtol (const char* str, char** endptr, int base);
2
3/* strtol example */
4#include <stdio.h>      /* printf */
5#include <stdlib.h>     /* strtol */
6
7int main ()
8{
9  char szNumbers[] = "2001 60c0c0 -1101110100110100100000 0x6fffff";
10  char * pEnd;
11  long int li1, li2, li3, li4;
12  li1 = strtol (szNumbers,&pEnd,10);
13  li2 = strtol (pEnd,&pEnd,16);
14  li3 = strtol (pEnd,&pEnd,2);
15  li4 = strtol (pEnd,NULL,0);
16  printf ("The decimal equivalents are: %ld, %ld, %ld and %ld.\n", li1, li2, li3, li4);
17  return 0;
18}

1#include <stdio.h>
2#include <stdlib.h>
3
4int main () {
5   char str[30] = "2030300 This is test";
6   char *ptr;
7   long ret;
8
9   ret = strtol(str, &ptr, 10);
10   printf("The number(unsigned long integer) is %ld\n", ret);
11   printf("String part is |%s|", ptr);
12
13   return(0);
14}

1char *strncpy(char *dest, const char *src, size_t n)

1# **strtol** | string to long integer | c library function
2# EX.
3# include <stdlib.h> // the library required to use strtol
4
5int main() {
6    const char str[25] = "   2020 was garbage.";
7    char *endptr;
8    int base = 10;
9    long answer;
10
11    answer = strtol(str, &endptr, base);
12    printf("The converted long integer is %ld\n", answer);
13    return 0;
14}
15
16# ignores any whitespace at the beginning of the string and
17# converts the next characters into a long integer.
18# Stops when it comes across the first non-integer character.
19
20long strtol(const char *str, char **endptr, int base)
21
22# str − string to be converted.
23
24# endptr − reference to an object of type char*, whose value is set 
25# to the next character in str after the numerical value.
26
27# base − This is the base, which must be between 2 and 36 inclusive,
28# or be the special value 0.

1long int strtol(const char *str, char **endptr, int base)

1long strtol( const char * theString, char ** end, int base );