C/stdlib.h/strtoull

strtoull: similar to strtoul() except that it returns an unsigned long long int

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Header file: #include <stdlib.h> Declaration: unsigned long long int strtoull(const char *restrict start, char **restrict end, int radix);

1. include <stdlib.h>

int main(void){

   char *start, *end;
   char a[100];
   end = a;
   *start= "12341234";
   printf("%d", strtoull(start, &end, 8));

}

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