15 条题解
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2
#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; } -
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#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; } -
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记住："No Answer."的情况分两种， 1.除数为0； 2.输入的符号不是“+-*/”。 就这么简单！！！
#include<iostream>//cin,cout,endl头文件 #include<cstdio>//printf的头文件 using namespace std;//命名空间 int main(){ double a,b; char c; cin>>a>>c>>b; if(c=='+'){ printf("%.2lf",a+b); } else if(c=='-'){ printf("%.2lf",a-b); } else if(c=='*'){ printf("%.2lf",a*b); } else if(c=='/'){ if(b==0){ cout<<"No Answer."; } else{ printf("%.2lf",a/b); } } else { cout<< "No Answer."; } return 0; } -
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#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; } -
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sng2025102 LV 5 @ 2025-7-9 16:27:28
#include #include #include 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)<<a*b; } else if(c=='/'&&b!=0) { cout<<fixed<<setprecision(2)<<a/b; } else { cout<<"No Answer."; } return 0;}
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#include #include #include using namespace std; int main() {
double a,b; char c; cin>>a>>c>>b; switch(c) { case'+':cout<<fixed<<setprecision(2)<<a+b;break; case'-':cout<<fixed<<setprecision(2)<<a-b;break; case'*':cout<<fixed<<setprecision(2)<<a*b;break; case'/': if (b==0) { cout<<"No Answer."; } else { cout<<fixed<<setprecision(2)<<a/b; } break; default:cout<<"No Answer."; } return 0;}
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#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; } -
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#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; }
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wangxizhe1
LV 8
@ 2024-7-27 19:30:06
#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;} }
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#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; }
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#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; } -
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#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; } -
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#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; }
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/***************************************** 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; } -
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zengzhijin LV 6 @ 2023-1-19 20:04:48
#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."; } } -
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/***************************************** 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; }
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