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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