1.3编程基础之算术表达式与顺序执行 11 计算浮点数相除的余数

​​​​​​http://noi.openjudge.cn/ch0103/11/

#include <bits/stdc++.h>
using namespace std;
int main()
{
	double a,b,r;
	int k;
	
	cin>>a>>b;
	
	k=a/b;
	r=a-k*b;
	
	printf("%g\n",r);
	
	return 0;
}

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