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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. void calculator()
  4. {
  5.     cout<<"Enter 2 numbers and the operator between it\n";
  6.     double a,b;char op;
  7.     cin>>a>>op>>b;
  8.     if(op=='+')
  9.     {
  10.         cout<<"result \t "<<a+b;
  11.     }
  12.     else if(op=='-')
  13.     {
  14.         cout<<"result \t "<<a-b;
  15.     }
  16.     else if(op=='*')
  17.     {
  18.         cout<<"result \t "<<a*b;
  19.     }
  20.     else if(op=='/')
  21.     {
  22.         if(b==0)
  23.         {
  24.             cout<<"run time error\n";
  25.         }
  26.         else
  27.         {
  28.             cout<<"result \t "<<a/b;
  29.         }
  30.     }
  31. }
  32. void square()
  33. {
  34.     cout<<"Enter square side \n";
  35.     long long side;cin>>side;
  36.     cout<<side*side;
  37. }
  38. void rectangle()
  39. {
  40.     cout<<"Enter height,width\n";
  41.     long long height,width;cin>>height>>width;
  42.     cout<<height*width;
  43. }
  44. void triangle()
  45. {
  46.     long long height,base;float ans;
  47.     cout<<"Enter height and base :\n";
  48.     cin>>height>>base;
  49.     ans=0.5*height*base;
  50.     cout<<"Area of triangle is : "<<ans;
  51. }
  52. int main()
  53. {
  54.     cout<<"Welcome \n";
  55.     cout<<"For the calculator press 1: \n";
  56.     cout<<"For area of the rectangle press 2: \n";
  57.     cout<<"For the square area press 3: \n";
  58.     cout<<"For area of the triangle press 4: \n";
  59.     int operation;cin>>operation;
  60.     system("cls");
  61.     if(operation==1)
  62.     {
  63.         calculator();
  64.     }
  65.     else if(operation==2)
  66.     {
  67.         rectangle();
  68.     }
  69.     else if(operation==3)
  70.     {
  71.         square();
  72.     }
  73.     else
  74.     {
  75.         triangle();
  76.     }
  77.     cout<<"\nThanks Very Much";
  78.     return 0;
  79. }
Success #stdin #stdout #stderr 0.01s 5280KB
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stdin
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Standard input is empty
stdout
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Welcome 
For the calculator press 1: 
For area of the rectangle press 2: 
For the square area press 3: 
For area of the triangle press 4: 
Enter height and base :
Area of triangle is : 0
Thanks Very Much
stderr
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sh: 1: cls: not found
https://ideone.com/ho51uF
language:
C++14 (gcc 8.3)
created:
13 days ago
visibility:
public

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