adding cs142 code

cs142/smcquay/fun_with_formatting/Makefile

@@ -0,0 +1,9 @@
+CPPFLAGS=-Wall -g -std=c++0x
+
+all: main
+
+test: all
+	./main
+
+clean:
+	@rm -rfv main.o main

cs142/smcquay/fun_with_formatting/main.cc

@@ -0,0 +1,34 @@
+#include <iostream>
+#include <iomanip>
+#include <cstdio>
+#include <cmath>
+
+using namespace std;
+
+
+int main(int argc, char * argv[]) {
+    float a = 12.123456;
+    float b = 12.125100;
+
+    cout << a << " " << b << " " << endl;
+    cout << setiosflags(ios::fixed) << setprecision(2) << a << " " << b << " " << endl;
+
+    printf("%0.2f %0.2f\n", a, b);
+    fprintf(stdout, "%0.2f %0.2f\n", a, b);
+    fprintf(stderr, "%0.2f %0.2f\n", a, b);
+
+    double input;
+    cin >> input;
+    double intpart = 0;
+    double fracpart = modf(input, &intpart);
+    printf("%f %f\n", intpart, fracpart);
+
+    if (fracpart == 0.5) {
+        cout << "exactly 0.5" << endl;
+    }
+    else {
+        cout << "not exactly 0.5" << endl;
+    }
+
+    return 0;
+}