简单的计算器

2

凯旋的青春 LV 7 @ 1 年前

#include <iostream>
#include <stdio.h>
#include <iomanip>
#include <math.h>
using namespace std;
const int N = 1e6 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a , b;
	char c;
	cin >> a >> c >> b;
	if( c == '+' )
	{
		cout << fixed << setprecision(2) << a + b;
	}
	else if( c == '-' )
	{
		cout << fixed << setprecision(2) << a - b;
	}
	else if( c == '*' )
	{
		cout << fixed << setprecision(2) << a * b;
	}
	else if( c == '/' )
	{
		if( b == 0 )
		{
			cout << "No Answer.";
		}
		else
		{
			cout << fixed << setprecision(2) << a / b;
		}
	}
	else
	{
		cout << "No Answer.";
	}
	return 0;
}

2

刘臻昊 LV 6 @ 2 年前

#include <bits/stdc++.h>

using namespace std;

int main()
{
    float a, b;

    char c; 

    cin >> a >> c >> b;

    if (c == '+')
    {
        cout << fixed << setprecision(2) << a + b;
    }
    else if (c == '-')
    {
        cout << fixed << setprecision(2) << a - b;
    }
    else if (c == '*')
    {
        cout << fixed << setprecision(2) << a * b;
    }
    else if (c == '/')
    {
        if (b != 0)
        {
            cout << fixed << setprecision(2) << a / b;
        }
        else
        {
            cout << "No Answer.";
        }
    }

    return 0;
}

0

邓梓昊 LV 8 @ 4 个月前

#pragma GCC optimize(3)
#pragma GCC target("avx")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define int long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
double a, b, d;
char c;
signed main() {
	cin >> a >> c >> b;
	if(c == '+')//从此处开始逐个判断是哪一个运算符号
		d = a + b;
	else if(c == '-')
		d = a-b;
	else if(c == '*')
		d = a*b;
	else if(c == '/'){
		if(b == 0){//不能除以零 
			puts("No Answer.");
			return 0;//输出后直接结束程序 
		}
		else
			d = a / b;
	}
	else{//c可能不是运算符号 
		puts("No Answer.");
		return 0;
	}
	printf("%.2lf\n",d);
	return 0;
}

纯享版：

#include <stdio.h>
#include <iostream>
#define int long long
using namespace std;
double a, b, d;
char c;
signed main(){
	cin >> a >> c >> b;
	if(c == '+')
		d = a + b;
	else if(c == '-')
		d = a-b;
	else if(c == '*')
		d = a*b;
	else if(c == '/'){
		if(b == 0){
			puts("No Answer.");
			return 0;
		}
		else
			d = a / b;
	}
	else{
		puts("No Answer.");
		return 0;
	}
	printf("%.2lf\n",d);
	return 0;
}

-1

2024sng28 LV 10 @ 6 个月前

#include <stdio.h> #include #include <math.h> #include using namespace std; int main() { float a,c; char b; cin>>a>>b>>c; if(b=='+'){ cout<<fixed<<setprecision(2)<<a+c; }else{ if(b=='-'){ cout<<fixed<<setprecision(2)<<a-c; }else{ if(b==''){ cout<<fixed<<setprecision(2)<<ac; }else{ if(b=='/'&&c!=0){ cout<<fixed<<setprecision(2)<<a/c; }else{ cout<<"No Answer."; } } } } return 0; }

-1

wangxizhe1 LV 7 @ 8 个月前

#include #include using namespace std; int main(){

while (true) { int n; double a,b,c; char f; cout<"请输入你要保留的小数位数:"; cin>n;

cout<<endl<<"请输入算式:";
cin>>a>>f>>b;
if(f=='+'){
	c=a+b;
}
if(f=='-'){
	c=a-b;
}else if(f=='*'){
	c=a*b;
}else if(f=='/'){
	c=a/b;
}
cout<<fixed<<setprecision(n)<<c<<endl<<"——————————————————————————————————————————"<<endl;

} }

-1

fanrong LV 5 @ 10 个月前

#include #include using namespace std; int main() { float a, b; char c; cin >> a >> c >> b; if (c == '+') { cout << fixed << setprecision(2) << a + b; } else if (c == '-') { cout << fixed << setprecision(2) << a - b; } else if (c == '*') { cout << fixed << setprecision(2) << a * b; } else if (c == '/') { if (b != 0) { cout << fixed << setprecision(2) << a / b; } else { cout << "No Answer."; } } else { cout << "No Answer."; } return 0; }

-1

yangxi LV 8 @ 11 个月前

#include <bits/stdc++.h>
#include <iostream>
#include <stdio.h>
#include <iomanip>
#include <math.h>
using namespace std;
const int N = 1e6 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a , b;
	char c;
	cin >> a >> c >> b;
	if( c == '+' )
	{
		cout << fixed << setprecision(2) << a + b;
	}
	else if( c == '-' )
	{
		cout << fixed << setprecision(2) << a - b;
	}
	else if( c == '*' )
	{
		cout << fixed << setprecision(2) << a * b;
	}
	else if( c == '/' )
	{
		if( b == 0 )
		{
			cout << "No Answer.";
		}
		else
		{
			cout << fixed << setprecision(2) << a / b;
		}
	}
	else
	{
		cout << "No Answer.";
	}
	return 0;
}

-1

youran LV 8 @ 3 年前

#include <iostream>
#include <iomanip>
using namespace std;
char a[5];
int main(){
    long double n,m;
    cin>>n>>a[0]>>m;
    if(a[0]=='+')
        cout<<fixed<<setprecision(2)<<n+m;
    else if(a[0]=='-')
        cout<<fixed<<setprecision(2)<<n-m;
    else if(a[0]=='*')
        cout<<fixed<<setprecision(2)<<n*m;
    else{
        if(m==0){
            cout<<"No Answer.";
            return 0;
        }
        cout<<fixed<<setprecision(2)<<n/m;
    }
    return 0;
}

-2

zxc2022 LV 7 @ 2 年前

#include<bits/stdc++.h> using namespace std; int main() { double a,b; char c; cin>>a>>c>>b; if(c=='+') cout<<fixed<<setprecision(2)<<a+b; else if(c=='-') cout<<fixed<<setprecision(2)<<a-b; else if(c=='') cout<<fixed<<setprecision(2)<<ab; else if(c=='/') if(b==0) cout<<"No Answer."; else cout<<fixed<<setprecision(2)<<a/b; else cout<<"No Answer."; return 0; }

-3

zengzhijin LV 6 @ 2 年前

#include<bits/stdc++.h>
using namespace std;
int main(){
	double a,c;
	char b;
	cin>>a>>b>>c;
	if(b=='+'){
        cout<<fixed<<setprecision(2)<<a+c;
	}
	else if(b=='-'){
        cout<<fixed<<setprecision(2)<<a-c;
	}
	else if(b=='*'){
        cout<<fixed<<setprecision(2)<<a*c;
	}
	else if(b=='/'){
		if(c!=0)
        	cout<<fixed<<setprecision(2)<<a/c;
		else
			cout<<"No Answer.";
	}else{
		cout<<"No Answer.";
	}
}

-3

huhe LV 7 SU @ 3 年前

/*****************************************
备注：
******************************************/
#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a,b;
	char c;
	cin >> a >> c >> b;
	double d;
	if(c == '+')
		d = a + b;
	else if(c == '-')
		d = a-b;
	else if(c == '*')
		d = a*b;
	else 
	{
		if(b == 0)
		{
			cout << "No Answer.";
			return 0;
		}
		else
			d = a/b;
	}
	printf("%.2lf\n",d);
	return 0;
}

-3

huhe LV 7 SU @ 3 年前

/*****************************************
备注：
******************************************/
#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	double a,b;
	char c;
	cin >> a >> c >> b;
	double d;
	if(c == '+')
		d = a + b;
	else if(c == '-')
		d = a-b;
	else if(c == '*')
		d = a*b;
	else 
	{
		if(b == 0)
			cout << "No Answer.";
		else
			d = a/b;
	}
	if( !( b == 0 && c == '/'))
		printf("%.2lf\n",d);
	return 0;
}

12 条题解

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12 条题解

简单的计算器

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