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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main(){
  5.     int month,day,year;
  6.     char symbol;
  7.  
  8.     do{
  9.         cout<<"Enter date: ";
  10.  
  11.  
  12.  
  13.         cin>>month>>symbol>>day>>symbol>>year;
  14.  
  15.         cin.clear();
  16.         cin.ignore(10000,'\n');  // Or better:
  17.                                  // std::numeric_limits<std::streamsize>::max()
  18.                                  // instead of just 10000 
  19.  
  20.         if(symbol=='/'&&month<=05&&day<=31&&year==2016){
  21.             cout<<month<<symbol<<day<<symbol<<year;
  22.  
  23.             if(month==01){          // this code is for month of January
  24.                 if(day==3||day==10||day==17||day==24||day==31){
  25.                     cout<<" is Sunday.";
  26.                 }
  27.                 else if(day==4||day==11||day==18||day==25){
  28.                     cout<<" is Monday.";
  29.                 }
  30.                 else if(day==5||day==12||day==19||day==26){
  31.                     cout<<" is Tuesday.";
  32.                 }
  33.                 else if(day==6||day==13||day==20||day==27){
  34.                     cout<<" is Wednesday.";
  35.                 }
  36.                 else if(day==7||day==14||day==21||day==28){
  37.                     cout<<" is Thursday.";
  38.                 }
  39.                 else if(day==1||day==8||day==15||day==22||day==29){
  40.                     cout<<" is Friday.";
  41.                 }
  42.                 else if(day==2||day==9||day==16||day==23||day==30){
  43.                     cout<<" is Saturday.";
  44.                 }
  45.  
  46.             }
  47.             else if(month==02){     //this code is for month of February
  48.                 if(day==7||day==14||day==21||day==28){
  49.                     cout<<" is Sunday.";
  50.                 }
  51.                 else if(day==1||day==8||day==15||day==22||day==29){
  52.                     cout<<" is Monday.";
  53.                 }
  54.                 else if(day==2||day==9||day==16||day==23){
  55.                     cout<<" is Tuesday.";
  56.                 }
  57.                 else if(day==3||day==10||day==17||day==24){
  58.                     cout<<" is Wednesday.";
  59.                 }
  60.                 else if(day==4||day==11||day==18||day==25){
  61.                     cout<<" is Thursday.";
  62.                 }
  63.                 else if(day==5||day==12||day==19||day==26){
  64.                     cout<<" is Friday.";
  65.                 }
  66.                 else if(day==6||day==13||day==20||day==27){
  67.                     cout<<" is Saturday.";
  68.                 }   
  69.             }
  70.             else if(month==03){         //this code is for month of March
  71.  
  72.                 if(day==6||day==13||day==20||day==27){
  73.                     cout<<" is Sunday.";
  74.                 }
  75.                 else if(day==7||day==14||day==21||day==28){
  76.                     cout<<" is Monday.";
  77.                 }
  78.                 else if(day==1||day==18||day==15||day==22||day==29){
  79.                     cout<<" is Tuesday.";
  80.                 }
  81.                 else if(day==2||day==9||day==16||day==23||day==30){
  82.                     cout<<" is Wednesday.";
  83.                 }
  84.                 else if(day==3||day==10||day==17||day==24||day==31){
  85.                     cout<<" is Thursday.";
  86.                 }
  87.                 else if(day==4||day==11||day==18||day==25){
  88.                     cout<<" is Friday.";
  89.                 }
  90.                 else if(day==5||day==12||day==19||day==26){
  91.                     cout<<" is Saturday.";
  92.                 }
  93.             }
  94.             else if(month==04){     //this code is for month of April
  95.  
  96.                 if(day==3||day==10||day==17||day==24){
  97.                     cout<<" is Sunday.";
  98.                 }
  99.                 else if(day==4||day==11||day==18||day==25){
  100.                     cout<<" is Monday.";
  101.                 }
  102.                 else if(day==5||day==12||day==19||day==26){
  103.                     cout<<" is Tuesday.";
  104.                 }
  105.                 else if(day==6||day==13||day==20||day==27){
  106.                     cout<<" is Wednesday.";
  107.                 }
  108.                 else if(day==7||day==14||day==21||day==28){
  109.                     cout<<" is Thursday.";
  110.                 }
  111.                 else if(day==1||day==8||day==15||day==22||day==29){
  112.                     cout<<" is Friday.";
  113.                 }
  114.                 else if(day==2||day==9||day==16||day==23||day==30){
  115.                     cout<<" is Saturday.";
  116.                 }
  117.             }   
  118.             else if(month==05){     //this code is for month of May
  119.  
  120.                 if(day==1||day==8||day==15|day==22||day==29){
  121.                     cout<<" is Sunday.";
  122.                 }
  123.                 else if(day==2||day==9||day==16||day==23||day==30){
  124.                     cout<<" is Monday.";
  125.                 }
  126.                 else if(day==3||day==10||day==17||day==24||day==31){
  127.                     cout<<" is Tuesday.";
  128.                 }
  129.                 else if(day==4||day==11||day==18||day==25){
  130.                     cout<<" is Wednesday.";
  131.                 }
  132.                 else if(day==5||day==12||day==19||day==26){
  133.                     cout<<" is Thursday.";
  134.                 }
  135.                 else if(day==6||day==13||day==20||day==27){
  136.                     cout<<" is Friday.";
  137.                 }
  138.                 else if(day==7||day==14||day==21||day==28){
  139.                     cout<<" is Saturday.";
  140.                 }
  141.             }
  142.             break;  
  143.         }
  144.         else{
  145.             cout<<"You have entered an invalid input.\n"<<endl;
  146.         }
  147.     }while(symbol!='/'||!(month<=05)||!(day<=31)||year!=2016);
  148.     return 0;
  149. }
Success #stdin #stdout 0s 3468KB
comments (?)
stdin 
dem/dem/dem
1/1/2016
stdout 
Enter date: You have entered an invalid input.

Enter date: 1/1/2016 is Friday.
https://ideone.com/KvCy1e
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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