1 files changed, 21 insertions, 0 deletions
diff --git a/others/easy20160714/17.c b/others/easy20160714/17.c
new file mode 100644
index 0000000..edc8f1c
--- /dev/null
+++ b/others/easy20160714/17.c
@@ -0,0 +1,21 @@
+#define _GNU_SOURCE
+#include <ctype.h>
+#include <stdio.h>
+
+int main()
+{
+	FILE *fi = fopen("INP.TXT", "r"), *fo = fopen("OUT.TXT", "w");
+	char c, prevc = 32;
+
+	while ((c = fgetc(fi)) != EOF) {
+		if (prevc ^ 32)
+			fputc(isupper(c) ? c + 32 : c, fo);
+		else if (c ^ 32)
+			fputc(islower(c)) ? c - 32 : c, fo);
+		prevc = c;
+	}
+
+	fcloseall();
+
+	return 0;
+}