给出一个整数，使用for循环，将平方和立方打印成一个表

#include <stdio.h>  
int main( void )  
{  
    int lower, upper, index;  
    int square, cube;  

    printf(Enter starting integer: );  
    scanf(%d, &lower);  
    printf(Enter ending integer: );  
    scanf(%d, &upper);  

    printf(%5s %10s %15s\n, num, square, cube);  
    for (index = lower; index <= upper; index++)  
    {  
        square = index * index;  
        cube = index * square;  
        printf(%5d %10d %15d\n, index, square, cube);  
    }  

    return 0;  
}