Differences

This shows you the differences between two versions of the page.

--- cs_lang:c [2011/07/12 10:25] – created cedric
+++ cs_lang:c [2011/07/12 10:37] – [Hello World] cedric
@@ Line 1: / Line 1: @@
+====== Learning C ======
+  * [[http://www.librarything.fr/work/3600740/book/62075147 | The C Programming Language]].
+====== Simple examples ======
+===== Hello World =====
 <code c>
 /* Hello World program */
@@ Line 11: / Line 18: @@
 }
+</code>
+Compile and run the program:
+<code bash>
+$ gcc -Wall hello.c -o hello.out
+hello.c:6: warning: return type defaults to ‘int’
+hello.c: In function ‘main’:
+hello.c:10: warning: control reaches end of non-void function
+$ ./hello.out
+Hello World
+</code>
+===== Read a file =====
+<code c>
+#include <iostream.h>
+#include <fstream.h>
+int main ()
+{
+        //  Open the file
+        ofstream inputFile ("./file.txt", ios::in);
+        // Test
+        if (!inputFile)
+        {
+                cerr << "Error" << endl;
+                exit (1);
+        }
+        char buf [1024];
+        //  Until there are no more lines in the file,
+        //  read and display it.
+        while (!inputFile.eof())
+        {
+                inputFile.getline (buf,1024);;
+                cout << buf << endl;;
+        }
+        // Close the file
+        inputFile.close ();;
+}
+</code>
+===== Equivalent in python =====
+<code python>
+for line in open("./file.txt", "r"):
+    print line
 </code>