Differences

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

--- sizeof [2013/06/20 09:00]
+++ sizeof [2021/04/05 11:23] (current)
@@ Line 1: / Line 1: @@
+====== Size Of ======
+Prints the size of variables on the standard out.
+<code>
+#include <stdio.h>
+#define PTRINT_SHORT
+#ifdef PTRINT_SHORT
+    typedef short ptrint;
+#endif
+#ifdef PTRINT_INT
+    typedef int ptrint;
+#endif
+#ifdef PTRINT_LONG
+    typedef long ptrint;
+#endif
+#ifdef PTRINT_LONGLONG
+    typedef long long ptrint;
+#endif
+int main(void) {
+    if (sizeof(ptrint) != sizeof(void*)) {
+        printf ("ERROR: ptrint doesn't match void* for this platform.\n");
+        printf ("   sizeof(void*    ) = %d\n", sizeof(void*));
+        printf ("   sizeof(ptrint   ) = %d\n", sizeof(ptrint));
+        printf ("   =================\n");
+        printf ("   sizeof(void*    ) = %d\n", sizeof(void*));
+        printf ("   sizeof(short    ) = %d\n", sizeof(short));
+        printf ("   sizeof(int      ) = %d\n", sizeof(int));
+        printf ("   sizeof(long     ) = %d\n", sizeof(long));
+        printf ("   sizeof(long long) = %d\n", sizeof(long long));
+        printf ("   sizeof(uns. int ) = %d\n", sizeof(unsigned int));
+        printf ("   sizeof(sig. int ) = %d\n", sizeof(int));
+        printf ("   sizeof(uns. long) = %d\n", sizeof(unsigned long));
+        printf ("   sizeof(sig. long) = %d\n", sizeof(long));
+        return 1;
+    }
+    /* rest of your code here */
+    return 0;
+}
+</code>
+{{tag>devel c ibm}}