ผลต่างระหว่างรุ่นของ "Psl/c++ cheat sheet"

รุ่นแก้ไขปัจจุบันเมื่อ 23:24, 7 มกราคม 2561

int - for typical 32-bit integers
double - for floating point numbers. Sometimes, it is OK to use float, but its precision is usually not enough.
char - for 1-byte characters
long long - for large integers (64 bits)

#include <iostream>
using namespace std;

main()
{
  int x;

  cin >> x;
  cout << "answer = " << (x+1) << endl;
}

Remarks: Don't forget the using namespace line. If you do not declare that you need to prefix cin, cout, endl with std, e.g., use std::cin.

@@ แถว 1: / แถว 1: @@
 == data types ==
+* <tt>int</tt> - for typical 32-bit integers
+* <tt>double</tt> - for floating point numbers.  Sometimes, it is OK to use <tt>float</tt>, but its precision is usually not enough.
+* <tt>char</tt> - for 1-byte characters
+* <tt>long long</tt> - for large integers (64 bits)
 == input/output ==
+=== c++: cin/cout ===
+<syntaxhighlight lang="cpp">
+#include <iostream>
+using namespace std;
+main()
+{
+  int x;
+  cin >> x;
+  cout << "answer = " << (x+1) << endl;
+}
+</syntaxhighlight>
+'''Remarks''':  Don't forget the <tt>using namespace</tt> line.  If you do not declare that you need to prefix cin, cout, endl with <tt>std</tt>, e.g., use <tt>std::cin</tt>.
+=== c: printf/scanf ===
 == c-style strings ==