打印一个表，每行给出一个整数，平和立方值

#include <stdio.h>

int main(void)
{
  long upper = -1, lower=0;
  int reads;

  do{  
    printf(Enter lower and upper integer limits (in that order): );
    reads = scanf(%ld%ld, &lower, &upper);
    if (reads != 2){
      while (getchar() != '\n') ; // if read fails, clear input buffer
    }
  } while (lower > upper); // if lower is greater than upper, get new input

  printf(\n);

  printf( Integer       | Square        | Cube          \n);
  printf(---------------|---------------|---------------\n);
  for (long int i = lower; i <= upper; i++)
  {
    printf( %-14ld| %-14ld| %-14ld\n, i, i * i, i * i * i);    
  }
  printf(\n);

  return 0;
}