cpp/pointers/increase

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Description
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shown to student

Write a program <tt>increase_by</tt>
that takes a command-line argument <tt>n</tt> and then adds <tt>n</tt>
to every number on input, and prints them out one per line.
For example
<pre>
./increase_by 5
</pre>
with input
<pre>
1
2
100
</pre>
should print
<pre>
6
7
105
</pre>

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Remarks
Comments, history, license, etc.

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Engine
Choices
json list of string, bool pairs
e.g. [["good", true], ["bad", false]]

Correct answer
Template / Reference solution

Template / Reference solution

#include <iostream>
#include <cstdlib>
using namespace std;

int main(int argc, char* argv[]) {

// parse command-line argument, save as variable n
\[
int n = atoi(argv[1]);
]\
// put each number from standard input as "read", one at a time
int read;
while (cin >> read) {
cout << \[read + n]\ << endl;
}
return 0;
}

Java test suite
See manual

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": "1\n2\n100", "args": ["5"]},
{"stdin": "1\n0\n3", "args": ["1"]},
{"stdin": "11\n22", "args": ["-10"]}
]

C++ test suite
See manual

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json list of strings
e.g. ["for","while"]

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e.g. ["java.util.*"]

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e.g. ["DataStructure"]

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Is example?
i.e., just a demo
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Add compiler flag(s)
json list of flags
e.g. ["-Wno-unused-variable"]

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json list of flags
see default_cppflags
e.g. ["-Wno-write-strings"]

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Property	Value
Description html markup shown to student	Write a program <tt>increase_by</tt> that takes a command-line argument <tt>n</tt> and then adds <tt>n</tt> to every number on input, and prints them out one per line. For example <pre> ./increase_by 5 </pre> with input <pre> 1 2 100 </pre> should print <pre> 6 7 105 </pre>
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	remove
Engine
Choices json list of string, bool pairs e.g. `[["good", true], ["bad", false]]`
Correct answer
Template / Reference solution
Template / Reference solution	#include <iostream> #include <cstdlib> using namespace std; int main(int argc, char* argv[]) { // parse command-line argument, save as variable n \[ int n = atoi(argv[1]); ]\ // put each number from standard input as "read", one at a time int read; while (cin >> read) { cout << \[read + n]\ << endl; } return 0; }
Java test suite See manual
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": "1\n2\n100", "args": ["5"]}, {"stdin": "1\n0\n3", "args": ["1"]}, {"stdin": "11\n22", "args": ["-10"]} ]
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	remove
Solution visibility	remove
Java imports json list of importables e.g. `["java.util.*"]`	remove
Override Java classname else defaults to websheet name	remove
Dependent on other websheets? json list of websheet names in this folder e.g. `["DataStructure"]`	remove
Is example? i.e., just a demo	remove
Add compiler flag(s) json list of flags e.g. `["-Wno-unused-variable"]`	remove
Remove default compiler flag(s) json list of flags see default_cppflags e.g. `["-Wno-write-strings"]`	remove

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