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<p>Ask the user to enter an integer indicating which day of the week it is (Sun. = 1, Mon. = 2, ..., Sat. = 7) and another integer, <tt>n</tt> for many days will pass.</p>
<p>Then output which day of the week it will be (again use <tt>1-7</tt> for Sun. through Sat.) after the <tt>n</tt> days will pass.</p>
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Copied from problem cpp/var-expr/char_arith (author: redekopp@usc.edu)
Copied from problem cpp/var-expr/hello (author: daveagp@gmail.com)
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Template / Reference solution
 
#include <iostream>
#include <iomanip>
using namespace std;
int main() {
   // variable for the current day and how many will pass
   int cday, n;
   
   cout << "Enter what day of the week it is"
        << " (Sun.=1, Mon.=2, ..., Sat.=7)?" << endl;
  \[
   cin >> cday;
  ]\
   
   cout << "Enter how many days will pass: " << endl;
  \[
   cin >> n;
   int day_plus_n = 1 + (cday - 1 + n) % 7;
  ]\
     cout << "In " << n << " days it will be weekday: " 
          << day_plus_n << endl;
   
  return 0;
}
C++ test suite
json list of stdin/args tests
e.g. [{"stdin":"hi", "args":["4", "5"]},
{"stdin":"noargs"}]

to just run once with no input use [{}]
 
[
   {"stdin":"5 3", "args":[]},
   {"stdin":"1 7", "args":[]},
   {"stdin":"3 16", "args":[]},
   {"stdin":"7 1", "args":[]}
   
]
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Note: problems are open-source by default (see 'Public permissions'). Assumed license for open problems is Creative Commons 4.0 Attribution-ShareAlike unless specified in 'Remarks'.