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--- computer_science:programming:cpp [2021/09/08 07:39] – mana
+++ computer_science:programming:cpp [2021/10/02 04:59] (current) – mana
@@ Line 1: / Line 1: @@
-Here is the most basic piece of C++ code:
+====== C++ ======
-<code cpp>
+C++ is a programming language.
-#include <iostream>
-using namespace std;
+Information about it will be added to this page.
-int main(){
+There will also be links to bits of codes for easy access:
-    cout << "Hello World";
+  * [[Computer Science:Programming:CPP:Hello World]]
-}
+===== Formatting cout =====
+It is possible to format cout's output by including ''#include <iomanip>''
+Then get access to these:
+<code cpp>
+cout << fixed << result << endl; // This will set the display to use fixed representation (default of 6 digits?)
+cout << fixed << setprecision(2) << result; // This will force cout to isplay only 2 decimals and will round to reach this result
 </code>
+<code cpp>
+cout << result << endl; // this would still show with the previous setprecision setting.
+cout << setprecision(3) << result2; // the variable is not affect by set precision, so it would now show 3 decimals
+cout << fixed << setprecision(2) << setw(15) << left << result << "End of line" <<endl;</code>
+Using setw we can force the display of a certain number of characters. In this case, if the variable is more than 15 characters, it will be truncated, if not then white spaces will be added. The next (optional) setting (in this case "left" determines the orientation of the text.