Added standard I/O stream examples

lab1/stream-examples/Makefile

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+# Define the compiler and the linker. The linker must be defined since
+# the implicit rule for linking uses CC as the linker. g++ can be
+# changed to clang++.
+CXX = g++
+CC  = $(CXX)
+
+# Generate dependencies in *.d files
+DEPFLAGS = -MT $@ -MMD -MP -MF $*.d
+
+# Define preprocessor, compiler, and linker flags. Uncomment the # lines
+# if you use clang++ and wish to use libc++ instead of GNU's libstdc++.
+# -g is for debugging.
+CPPFLAGS =  -std=c++11 -I.
+CXXFLAGS =  -O2 -Wall -Wextra -pedantic-errors -Wold-style-cast 
+CXXFLAGS += -std=c++11 
+CXXFLAGS += -g
+CXXFLAGS += $(DEPFLAGS)
+LDFLAGS =   -g 
+#CPPFLAGS += -stdlib=libc++
+#CXXFLAGS += -stdlib=libc++
+#LDFLAGS +=  -stdlib=libc++
+
+# Targets
+PROGS =  read-words example-out
+
+all: $(PROGS)
+
+# Phony targets
+.PHONY: all test clean distclean
+
+# Standard clean
+clean:
+	rm -f *.o $(PROGS)
+
+distclean: clean
+	rm *.d
+
+# Include the *.d files
+SRC = $(wildcard *.cc)
+-include $(SRC:.cc=.d)

lab1/stream-examples/example-out.cc

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+/* An example program that prints text to both standard out and standard error.
+ */
+#include <iostream>
+
+int main()
+{
+    std::cout << "This text is written to stdout\n";
+    std::cerr << "And this is written to stderr\n";
+    std::cout << "More text to stdout\n";
+    std::cerr << "And some more to stderr\n";
+}

lab1/stream-examples/read-words.cc

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+/* An example program that reads words from the standard input
+ * and prints them each on a separate line to standard out.
+ *
+ * If running this from the terminal, note two things:
+ * 1. Text is buffered and not sent to the program until
+ *    you hit enter. 
+ *
+ * 2. The program reads until it reaches the end of the stream.
+ *    For the terminal, you need to send an end-of-file (EOF)
+ *    character by pressing <Ctrl>-d as the first character on
+ *    a line.
+ */
+#include <iostream>
+#include <string>
+
+int main()
+{
+    std::string s;
+    while(std::cin >> s){
+        std::cout << s << '\n';
+    }
+}