Design a function in C language to implement addition, subtraction, multiplication and division operations

Design a function in C language to implement addition, subtraction, multiplication and division operations

# 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 ("Please enter what operation you want to calculate" ""-""*""/"\n");

scanf("%c", &t);

if(t == ' ')

{

printf（＂Please enter the two numbers to be added\n＂）;

scanf("%lf %lf", &i, &j);

k = jia(i, j);

printf ("The sum of these two numbers is %6.2lf\n", k);

}

else if(t == '-')

{

printf（＂Please enter the two numbers to be subtracted\n＂）;

scanf("%lf %lf", &i, &j);

k = jian(i, j);

printf ("The subtraction of these two numbers is %6.2lf\n", k);

}

else if(t == '*')

{

printf（＂Please enter the two numbers to be compared\n＂）;

scanf("%lf %lf", &i, &j);

k = cheng(i, j);

printf ("The phase of these two numbers is %6.2lf\n", k);

}

else if(t == '/')

{

printf（＂Please enter the two numbers you want to compare\n＂）;

scanf("%lf %lf", &i, &j);

k = chu(i, j);

printf ("These two numbers are %6.2lf\n", k);

}

else

{

printf ("Sorry, currently only supports """-""*""/"\n");

}

return 0;

}

How to write a C language program to let the computer automatically perform four arithmetic calculations

#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");

Use the basic library classes of java to implement a program that calculates four arithmetic operations

package Ex1; //Ex1 is the package name

import java.util.*;

public class SzYs { //SzYs is the class name

public static void main(String[] args){

double num1;

double num2;

String fuHao;

Scanner input = new Scanner(System.in);

System.out.print(＂Enter the value of the first number:＂);

num1 = input.nextDouble();

System.out.print(＂Enter the value of the second number:＂);

num2 = input.nextDouble();

System.out.print("Enter operation symbol (- * \\)");

fuHao = input.next();

if(fuHao.equals(＂＂)){

System.out.print(The sum of num1 " and " num2 " is " (num1 num2));

}else if(fuHao.equals(＂-＂)){

System.out.print(The difference between num1 " and " num2 " is " (num1-num2));

}else if(fuHao.equals(＂8＂)){

System.out.print(The product of num1 " and " num2 " is " (num1*num2));

}else if(fuHao.equals(＂\\＂)){

if(num2==0){

System.out.print("The divisor cannot be 0");

}else{

System.out.print(The quotient of num1 " and " num2 " is " (num1/num2));

}

}else{

System.out.print("The symbol cannot be recognized");

}

}

}

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