Problem Statement
Takahashi is making a computer baseball game.
He will write a program that shows a batter's batting average with a specified number of digits.
There are integers $A$ and $B$, which satisfy $1 \leq A \leq 10$ and $0 \leq B \leq A$.
Let $S$ be the string obtained as follows.
- Round off $\dfrac{B}{A}$ to three decimal digits, then write the integer part ($1$ digit),
.(the decimal point), and the decimal part ($3$ digits) in this order, with trailing zeros.
For example, if $A=7$ and $B=4$, then $\dfrac{B}{A} = \dfrac{4}{7} = 0.571428\dots$ rounded off to three decimal digits is $0.571$. Thus, $S$ is 0.571.
You are given $A$ and $B$ as the input and asked to print $S$.
Constraints
- $1 \leq A \leq 10$
- $0 \leq B \leq A$
- $A$ and $B$ are integers.
Input
The input is given from Standard Input in the following format:
$A$ $B$
Output
Print $S$ in the format specified in the Problem Statement. Note that answers in different formats will be considered wrong.
Sample Input 1
7 4
Sample Output 1
0.571
As explained in the Problem Statement, $\dfrac{B}{A} = \dfrac{4}{7} = 0.571428\dots$ rounded off to three decimal digits is $0.571$. Thus, $S$ is 0.571.
Sample Input 2
7 3
Sample Output 2
0.429
$\dfrac{B}{A} = \dfrac{3}{7} = 0.428571\dots$ rounded off to three decimal digits is $0.429$. (Note that it got rounded up.)
Thus, $S$ is 0.429.
Sample Input 3
2 1
Sample Output 3
0.500
$\dfrac{B}{A} = \dfrac{1}{2} = 0.5$ rounded off to three decimal digits is again $0.5$.
Thus, $S$ is 0.500. Note that it must have three decimal places.
Sample Input 4
10 10
Sample Output 4
1.000
Sample Input 5
1 0
Sample Output 5
0.000
直接按题意模拟，输出 \(\frac{a}{b}\)，保留三位即可。
#include<cstdio>
int a,b;
int main()
{
scanf("%d%d",&a,&b);
printf("%.3lf",1.00*b/a);
}