C語言設計一個函數實作加減乘除運算

C語言設計一個函數實作加減乘除運算

# include

double jia(double x, double d)

{

double s;

s = x d;

return s;

}

double jian(double x, double d)

{

double s;

s = x-d;

return s;

}

double cheng(double x, double d)

{

double s;

s = x*d;

return s;

}

double chu(double x, double d)

{

double s;

s = x/d;

return s;

}

int main(void)

{

double i, j, k;

char t;

k = 0;

printf（＂請輸入要計算什麼運算「 」「-」「*」「/」\n＂）;

scanf(＂%c＂, &t);

#if(t == ' ')

{

printf（＂請輸入要相加的兩個數\n＂）;

scanf(＂%lf %lf＂, &i, &j);

k = jia(i, j);

printf（＂這兩個數字相加為%6.2lf\n＂, k）;

}

else if(t == '-')

{

printf（＂請輸入要相減的兩個數\n＂）;

scanf(＂%lf %lf＂, &i, &j);

k = jian(i, j);

printf（＂這兩個數相減為%6.2lf\n＂, k）;

}

else if(t == '*')

{

printf（＂請輸入要相*的兩個數\n＂）;

scanf(＂%lf %lf＂, &i, &j);

k = cheng(i, j);

printf（＂這兩個數相*為%6.2lf\n＂, k）;

}

else if(t == '/')

{

printf（＂請輸入要相/的兩個數\n＂）;

scanf(＂%lf %lf＂, &i, &j);

k = chu(i, j);

printf（＂這兩個數相/為%6.2lf\n＂, k）;

}

else

{

printf（＂對不起目前只支援「 」「-」「*」「/」\n＂）;

}

return 0;

}

如何寫一個C語言程式讓電腦自動出四則運算計算

#include

#include

#include

#include

int main()

{

int type;

int left, right;

float result;

srand(unsigned(time(NULL)));

while(1)

{

type = rand() % 4;

left = rand() % 10;

right = rand() % 10;

switch(type)

{

case 0:

printf(＂%d %d = ?\n＂, left, right);

scanf(＂%f＂, &result);

if(left right == result)

printf(＂right!\n＂);

else

printf(＂wrong!The result is %d\n＂, left right);

break;

case 1:

printf(＂%d - %d = ?\n＂, left, right);

scanf(＂%f＂, &result);

if(left - right == result)

printf(＂right!\n＂);

else

printf(＂wrong!The result is %d\n＂, left - right);

break;

case 2:

printf(＂%d * %d = ?\n＂, left, right);

scanf(＂%f＂, &result);

if(left * right == result)

printf(＂right!\n＂);

運用java的基本函式庫類別實作一個計算四則運算的程式

package Ex1; //Ex1為套件名稱

import java.util.*;

public class SzYs { //SzYs為類別名稱

public static void main(String[] args){

double num1;

double num2;

String fuHao;

Scanner input = new Scanner(System.in);

System.out.print（＂輸入第一個數的值：＂）；

num1 = input.nextDouble();

System.out.print（＂輸入第二個數的值：＂）；

num2 = input.nextDouble();

System.out.print（＂輸入運算符號（ - * \\ ）＂）；

fuHao = input.next();

if(fuHao.equals(＂ ＂)){

System.out.print(num1 ＂與＂ num2 ＂的和是＂ （num1 num2）);

}else if(fuHao.equals(＂-＂)){

System.out.print(num1 ＂與＂ num2 ＂的差是＂ （num1-num2）);

}else if(fuHao.equals(＂8＂)){

System.out.print(num1 ＂與＂ num2 ＂的積是＂ （num1*num2）);

}else if(fuHao.equals(＂\\＂)){

if(num2==0){

System.out.print（＂除數不能為0＂）;

}else{

System.out.print(num1 ＂與＂ num2 ＂的商是＂ （num1/num2）);

}

}else{

System.out.print（＂不能辨識該符號＂）；

}

}

}

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