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--- c:preprocessor:error [2013/10/23 15:23]
Awad A. Bekhet [description of error]
+++ c:preprocessor:error [2024/02/16 01:06] (current)
@@ Line 1: / Line 1: @@
 ====== error ======
 <code c>
+#error your error_message
 </code>
 ==== description of error ====
 The #error directive emits a user-specified error message at compile time and then terminates the compilation.
+The following code will cause in compilation error:
+<code c>
+#include<stdio.h>
+int main()
+{
+    printf("code-reference.com/c");
+    return 0;
+}
+#if !defined(PASS_COMPILER)
+#error Syntax to Pass this stage is required !
+#endif
+</code>
+The following code will compile:
 <code c>
+#define PASS_COMPILER      /*You can write this definition here or any*/
+#include<stdio.h>
+int main()
+{
+    printf("code-reference.com/c");
+    /*#define PASS_COMPILER*/
+    return 0;
+}
 #if !defined(PASS_COMPILER)
-//<fc #FF0000>#error</fc> <fc #0000FF>C++ compiler required.</fc>//
+#error Syntax to Pass this stage is required !
 #endif
 </code>
 ===== output of error c example =====
-    no example at the moment
+In first program:
+No output, because __"PASS_COMPILER"__ is __not defined__ in program, so __compilation terminates__ with Error Message as shown:
+<fc #FF0000>//"\main.c|4|error: #error Syntax to Pass this stage is required !|"//</fc>
+In the Second program:
+Output will be:
+<code>
+code-reference.com/c
+</code>

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