Niuke network realizes simple calculator function

Catalog

Title Description

AC Code

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Title Description

Enter a string on the keyboard , Format ： How it works Integers 1 Integers 2, Write a program to parse the... In the string 3 Part content , Then do the corresponding operation , And output the result .

for example ：

Input “add 10 20”, Then add （10+20）;

Input “sub 10 20”, Then subtract （10-20）;

Input “mul 10 20”, Then do multiplication （10*20）;

Input “div 10 20”, Then do the division operation （10/20）, If the divisor is 0, Then do no operation , Output “Error”;

Be careful ： Operation mode ignores case , namely “add” Same as “Add”、“ADD” etc. .

Input description ：

Enter a string on the keyboard , Format ： How it works Integers 1 Integers 2

The integer range is [-100, 100]

Output description ：

Output the result of the operation （ Division does not take into account decimals ）, If the divisor is 0, Then do no operation , Output “Error”

Example 1

Input ：

add 10 3

Copy output ：

13

Copy

Example 2

Input ：

sub 10 3

Copy output ：

7

Copy

Example 3

Input ：

mul 10 3

Copy output ：

30

Copy

Example 4

Input ：

div 10 3

Copy output ：

3

Copy

Example 5

Input ：

div 10 0

Copy output ：

Error

Copy

Example 6

Input ：

ADD 20 20

Copy output ：

40

AC Code

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main() {
	string code;
	int a, b;
	cin >> code >> a >> b;
	transform(code.begin(), code.end(), code.begin(), ::toupper);
	if (code == "ADD")
		cout << a + b;
	else if (code == "SUB")
		cout << a - b;
	else if (code == "MUL")
		cout << a*b;
	else {
		if (b)
			cout << a / b;
		else
			cout << "Error";
	}
}