diff --git a/.gitignore b/.gitignore
index 530a0f4..c6be593 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ ex3
 ex4
 ex5
 ex6
+ex7
diff --git a/Makefile b/Makefile
index a1a4945..f910ecc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CFLAGS=-Wall -g
 
-EXERCISES = ex1 ex3 ex4 ex5 ex6
+EXERCISES = ex1 ex3 ex4 ex5 ex6 ex7
 
 
 all: $(EXERCISES)
diff --git a/ex7.c b/ex7.c
new file mode 100644
index 0000000..6f3ef30
--- /dev/null
+++ b/ex7.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+    int bugs = 100;
+    double bug_rate = 1.2;
+
+    printf("You have %d bugs imaginary rate of %f.\n",
+            bugs, bug_rate);
+
+    long universe_of_defects = 1 * 1024 * 1024 * 1024;
+    printf("The entire universe has %ld bugs.\n",
+            universe_of_defects);
+
+    double expected_bugs = bugs * bug_rate;
+    printf("You are expected to have %f bugs.\n",
+            expected_bugs);
+
+    double part_of_universe = expected_bugs / universe_of_defects;
+    printf("That is only a %e portion of the universe.\n",
+            part_of_universe);
+
+
+    char nul_byte = '\0';
+    int care_percentage = bugs * nul_byte;
+    printf("Which means you should care %d%%.\n",
+            care_percentage);
+
+    return 0;
+}