情報処理5レポート課題(3)の解答例

更新:2009年5月19日

有理数を表す構造体を宣言し、四則演算、構築、画面表示を行う関数を定義して main関数で使ってみてください。約分はしなくてもかまいません(興味があればどうぞ)。

有理数は分母・分子が整数として表されるので、構造体のメンバはint型2つになる。メンバ名は例えば、numerator,denominatorとか bunshi,bunboとか。
構造体名は例えばFracionとかBunsuとか。
構築関数の引数の順に気を付けてください。特に、定義する際の順と呼び出す際の順が同じであることに注意してください。
表示は例えば"(345)/(-456)"としてください。

約分はしなくてもかまいません(興味があればどうぞ)。

`fraction.c`
#include<stdio.h> struct Fraction{ int Denominator, Numerator; }; struct Fraction Fraction(int num, int den); void print_Fraction(struct Fraction arg); struct Fraction add_Fraction(struct Fraction lhs, struct Fraction rhs); struct Fraction sub_Fraction(struct Fraction lhs, struct Fraction rhs); struct Fraction mul_Fraction(struct Fraction lhs, struct Fraction rhs); struct Fraction div_Fraction(struct Fraction lhs, struct Fraction rhs); struct Fraction yakubun(struct Fraction arg); int main(void){ struct Fraction x=Fraction(2, 3), y=Fraction(-1, 3), z; printf("x="); print_Fraction(x); printf("y="); print_Fraction(y); z=add_Fraction(x, y); printf("z=x+y="); print_Fraction(z); z=sub_Fraction(x, y); printf("z=x-y="); print_Fraction(z); z=mul_Fraction(x, y); printf("z=xy="); print_Fraction(z); z=div_Fraction(x, y); printf("z=x/y="); print_Fraction(z); return 0; } struct Fraction Fraction(int num, int den){ struct Fraction result; result.Denominator=den; result.Numerator=num; /result=yakubun(result);/* return result; } void print_Fraction(struct Fraction arg){ printf("(%d)/(%d)\n", arg.Numerator, arg.Denominator); return; } struct Fraction add_Fraction(struct Fraction lhs, struct Fraction rhs){ struct Fraction result; result.Denominator=lhs.Denominatorrhs.Denominator; result.Numerator=lhs.Denominatorrhs.Numerator+lhs.Numeratorrhs.Denominator; / result=yakubun(result); / return result; } struct Fraction sub_Fraction(struct Fraction lhs, struct Fraction rhs){ struct Fraction result; result.Denominator=lhs.Denominatorrhs.Denominator; result.Numerator=rhs.Denominatorlhs.Numerator-rhs.Numeratorlhs.Denominator; /* result=yakubun(result); / return result; } struct Fraction mul_Fraction(struct Fraction lhs, struct Fraction rhs){ struct Fraction result; result.Denominator=lhs.Denominatorrhs.Denominator; result.Numerator=lhs.Numeratorrhs.Numerator; / result=yakubun(result); / return result; } struct Fraction div_Fraction(struct Fraction lhs, struct Fraction rhs){ struct Fraction result; result.Denominator=lhs.Denominatorrhs.Numerator; result.Numerator=lhs.Numeratorrhs.Denominator; / result=yakubun(result); */ return result; } int min(int lhs, int rhs){ if(lhs<rhs)return lhs; else return rhs; } struct Fraction yakubun(struct Fraction arg){ struct Fraction result; int tmp_numerator=arg.Numerator; int tmp_denominator=arg.Denominator; int i; for(i=2;i<=min(abs(tmp_numerator), abs(tmp_denominator));i++){ if(abs(tmp_numerator)%i==0 && abs(tmp_denominator)%i==0){ tmp_numerator/=i; tmp_denominator/=i; } } result.Numerator=tmp_numerator; result.Denominator=tmp_denominator; return result; }

fraction.c

#include<stdio.h>

struct Fraction{
	int Denominator, Numerator;
};

struct Fraction Fraction(int num, int den);
void print_Fraction(struct Fraction arg);
struct Fraction add_Fraction(struct Fraction lhs, struct Fraction rhs);
struct Fraction sub_Fraction(struct Fraction lhs, struct Fraction rhs);
struct Fraction mul_Fraction(struct Fraction lhs, struct Fraction rhs);
struct Fraction div_Fraction(struct Fraction lhs, struct Fraction rhs);
struct Fraction yakubun(struct Fraction arg);

int main(void){
	struct Fraction x=Fraction(2, 3), y=Fraction(-1, 3), z;
	printf("x="); print_Fraction(x);
	printf("y="); print_Fraction(y);
	z=add_Fraction(x, y);
	printf("z=x+y="); print_Fraction(z);
	z=sub_Fraction(x, y);
	printf("z=x-y="); print_Fraction(z);
	z=mul_Fraction(x, y);
	printf("z=x*y="); print_Fraction(z);
	z=div_Fraction(x, y);
	printf("z=x/y="); print_Fraction(z);
	return 0;
}

struct Fraction Fraction(int num, int den){
	struct Fraction result;
	result.Denominator=den;
	result.Numerator=num;
	/***result=yakubun(result);***/
	return result;
}

void print_Fraction(struct Fraction arg){
	printf("(%d)/(%d)\n", arg.Numerator, arg.Denominator);
	return;
}

struct Fraction add_Fraction(struct Fraction lhs, struct Fraction rhs){
	struct Fraction result;
	result.Denominator=lhs.Denominator*rhs.Denominator;
	result.Numerator=lhs.Denominator*rhs.Numerator+lhs.Numerator*rhs.Denominator;
	/***
	result=yakubun(result);
	***/
	return result;
}

struct Fraction sub_Fraction(struct Fraction lhs, struct Fraction rhs){
	struct Fraction result;
	result.Denominator=lhs.Denominator*rhs.Denominator;
	result.Numerator=rhs.Denominator*lhs.Numerator-rhs.Numerator*lhs.Denominator;
	/***
	result=yakubun(result);
	***/
	return result;
}

struct Fraction mul_Fraction(struct Fraction lhs, struct Fraction rhs){
	struct Fraction result;
	result.Denominator=lhs.Denominator*rhs.Denominator;
	result.Numerator=lhs.Numerator*rhs.Numerator;
	/***
	result=yakubun(result);
	***/
	return result;
}

struct Fraction div_Fraction(struct Fraction lhs, struct Fraction rhs){
	struct Fraction result;
	result.Denominator=lhs.Denominator*rhs.Numerator;
	result.Numerator=lhs.Numerator*rhs.Denominator;
	/***
	result=yakubun(result);
	***/
	return result;
}

int min(int lhs, int rhs){
	if(lhs<rhs)return lhs;
	else	return rhs;
}

struct Fraction yakubun(struct Fraction arg){
	struct Fraction result;
	int tmp_numerator=arg.Numerator;
	int tmp_denominator=arg.Denominator;
	int i;

	for(i=2;i<=min(abs(tmp_numerator), abs(tmp_denominator));i++){
		if(abs(tmp_numerator)%i==0 && abs(tmp_denominator)%i==0){
			tmp_numerator/=i;
			tmp_denominator/=i;
		}
	}
	result.Numerator=tmp_numerator;
	result.Denominator=tmp_denominator;
	return result;
}

info5/