题解 - 简单计算器

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wlx LV 5 @ 2024-10-3 17:48:33

#include<bits/stdc++.h>
using namespace std;
int main() 
{
 int a,b; 
 char ch; 
 cin>>a>>b>>ch; 
 switch(ch) 
 { 
 case'+': cout<<a+b;break; 
 case'-': cout<<a-b;break; 
 case'*': cout<<a*b;break; 
 case'/': if(b==0) printf("error!"); else cout<<a/b; 
 } 
 return 0; 
}

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23邹天乐 LV 5 @ 2024-1-7 13:10:44

#include<bits/stdc++.h> using namespace std; int main() { int a,b; char ch; cin>>a>>b>>ch; switch(ch) { case'+': cout<<a+b;break; case'-': cout<<a-b;break; case'': cout<<ab;break; case'/': if(b==0) printf("error!"); else cout<<a/b; } return 0; }

242968283124 LV 6 @ 2024-11-12 12:53:02

using namespace std;
int main()
{
	int a,b;
	char c;
	cin>>a>>b>>c;
	if(c=='+')
	cout<<a+b;
	else if(c=='-')
	cout<<a-b;
	else if(c=='*')
	cout<<a*b;
	else if(c=='/')
	{
	    if(b==0)
		cout<<"error!";
		else
		cout<<a/b;	
	}
	return 0;
}

0
中分头背带裤我叫ikun你记住 (liusheng) LV 5 @ 2024-11-11 17:26:30

#include<bits/stdc++.h> using namespace std; int main(){ int a,b; char op; cin>>a>>b>>op; if(op=='/'){ if(b0) puts("error!"); else cout<<a/b; }else if(op'+') cout<<a+b; else if(op=='-') cout<<a-b; else if(op=='') cout<<ab; else puts("error!"); return 0; }
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坂上智代 (24 邓烨磊) LV 9 @ 2024-11-8 13:02:03

#include<bits/stdc++.h> using namespace std; int main() { int a,b; char n; cin>>a>>b>>n; switch(n){ case'+':cout<<a+b<<endl;break; case'-':cout<<a-b<<endl;break; case'':cout<<ab<<endl;break; case'/': if(b!=0){cout<<a/b<<endl;} else {cout<<"error!"<<endl;} break;

} return 0; }

再用scanf就是dog（我是傻逼） (zjs) LV 10 @ 2024-10-12 12:28:54

思路

当且仅当 $opt=$ / 并且 $b=0$ 时，输出 error! 。否则输出值。用 if 可以解决

code

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	char op;
	cin>>a>>b>>op;
	if(op=='/'){
		if(b==0) puts("error!");
		else cout<<a/b;
	}else if(op=='+')
		cout<<a+b;
	else if(op=='-')
		cout<<a-b;
	else if(op=='*')
		cout<<a*b;
	else
	    puts("error!");
	return 0;
}

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23级lll LV 3 @ 2023-12-31 16:30:56

#include<bits/stdc++.h> using namespace std; int main() { int a,b; char ch; cin>>a>>b>>ch; switch(ch) { case'+': cout<<a+b;break; case'-': cout<<a-b;break; case'': cout<<ab;break; case'/': if(b==0) printf("error!"); else cout<<a/b; } return 0; }
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23_Shirasu_Azusa (Shirasu_Azusa) LV 7 @ 2023-12-26 13:33:44

考虑使用switch函数进行符号枚举