1 files changed, 31 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_PRACTICAL_C/15_1.c b/reference/C/CONTRIB/OR_PRACTICAL_C/15_1.c
new file mode 100644
index 0000000..69ecdef
--- /dev/null
+++ b/reference/C/CONTRIB/OR_PRACTICAL_C/15_1.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+main()
+{
+    /* two numbers to work with */
+    float number1, number2;
+    float result;               /* result of calculation */
+    int   counter;              /* loop counter and accuracy check */
+
+    number1 = 1.0;
+    number2 = 1.0;
+    counter = 0;
+
+    while (number1 + number2 != number1) {
+        counter++;
+        number2 = number2 / 10.0;
+    }
+    (void) printf("%2d digits accuracy in calculations\n", counter);
+
+    number2 = 1.0;
+    counter = 0;
+
+    while (1) {
+        result = number1 + number2;
+        if (result == number1)
+            break;
+        counter++;
+        number2 = number2 / 10.0;
+    }
+    (void) printf("%2d digits accuracy in storage\n", counter);
+    return (0);
+}