Java Table of Power Help

[SlaughterApollo]

Doing my last minute summer homework for my AP computer science class and I need a little help. I need to output in the console strictly

a    b    pow( a , b )

1    2     1

2    3     8

3    4     81  

 

And so one. This would be a breeze for me in visual basic but im very new with java can someone help me out?

[79wjd]

Doing my last minute summer homework for my AP computer science class and I need a little help. I need to output in the console strictly

a    b    pow(a, B)

1    2     1

2    3     8

3    4     81  

 

And so one. This would be a breeze for me in visual basic but im very new with java can someone help me out?

while (b>1){

a*=a;

b--;

}

[SlaughterApollo]

while (b>1){

a*=a;

b--;

}

a little explanation please?

[79wjd]

a little explanation please?

While b>1

Take a and multiply it by a, and store it to total. 

reduce b by 1 

 

 

Whoops, I actually noticed a mistake. 

 

It should be: 

 

int total = 0;

while (b>1){

total = a*a;

b--;

}

 

P.s. you might want to use double for total instead of int as a double can hold a much larger value than an int--so something like 100000^1000000 would exceed what can be stored in an int. So: 

 

double total = 0.0;while (b>1){total = a*a;b--;}

[SlaughterApollo]

 

While b>1

Take a and multiply it by a, and store it to total. 

reduce b by 1 

 

 

Whoops, I actually noticed a mistake. 

 

It should be: 

 

int total = 0;

while (b>1){

total = a*a;

b--;

}

 

P.s. you might want to use double for total instead of int as a double can hold a much larger value than an int--so something like 100000^1000000 would exceed what can be stored in an int. So: 

double total = 0.0;while (b>1){total = a*a;b--;}

My confusion comes in at the point of making it display like a table

[79wjd]

My confusion comes in at the point of making it display like a table

ah I didn't put it into a table, I just did the actual math. To put it into a table:

while (b>1){       total = a*a       b--;}System.out.print(a + " " + b + " " + total + "\n");

[Ciccioo]

while (b>1){       total = a*a       b--;}System.out.print(a + " " + b + " " + total + "\n");

that formula does not calculate any power correctly apart from squares

anyway, if the OP just wanted to know how to print a table, that's it

the algorithm for powers shouldn't be too hard to figure out, or he can just use Math.pow, but it works with doubles so he might want to implement his own function

[79wjd]

that formula does not calculate any power correctly apart from squares

anyway, if the OP just wanted to know how to print a table, that's it

the algorithm for powers shouldn't be too hard to figure out, or he can just use Math.pow, but it works with doubles so he might want to implement his own function

Whoops, 

double a = 2; double b = 0;double power = b;double base = a; if (b==0)       System.out.print(base + " " + power + " " + 1 + "\n");else {    while (b>1){        a *= base;         b--;     }    System.out.print(base + " " + power + " " + a + "\n");}

[Ciccioo]

Whoops, 

double base = a; while (b>1){     a *= base;      b--; }System.out.print(base + " " + b + " " + a + "\n");

Fails for exponent = 0

[79wjd]

Fails for exponent = 0

Way to post before I got a chance to  edit due to my internet dropping out. 

 

/see above. 

[Ciccioo]

Way to post before I got a chance to  edit due to my internet dropping out. 

 

/see above.

Yup, that's correct

The 0 case can also not be treated as a special case, like this

int result = 1;while(b--)        result *= a;