#include <stdio.h>
#include <stdlib.h>
int main()
{
char str[5] = "0123";
char *ptr;
long ret;
ret = strtol(str, &ptr, 0);
if (*ptr != str[4] + 0) {
puts("Invalid numeric literal");
} else {
printf("%o octal is in decimal %ld\n", ret,ret);
}
return(0);
}