C/stdlib.h/strtoul

    
    
//Header:     #include <stdlib.h>  
//Declaration:  unsigned long int strtoul(const char *start, char **end, int radix); 
 
#include <stdlib.h>
int main(void){
    char *start, *end;
    char a[100];
    end = a;
    *start= "12341234";
    printf("%d", strtoul(start, &end, 8));
}
         
/*0*/