Data commit

Task/Gotchas/C/gotchas-1.c

@@ -0,0 +1,3 @@
+if(a=b){} //assigns to "a" the value of "b". Then, if "a" is nonzero, the code in the curly braces is run.
+
+if(a==b){} //runs the code in the curly braces if and only if the value of "a" equals the value of "b".

Task/Gotchas/C/gotchas-10.c

@@ -0,0 +1,7 @@
+int main()
+{
+int x = 3;
+int y = 5;
+int z = 7;
+printf("%d %d %d %x %x",x,y,z);  //on an Intel cpu the first %x reveals %%ebp and the second reveals the return address.)
+}

Task/Gotchas/C/gotchas-2.c

@@ -0,0 +1 @@
+int foo[4] = {4,8,12,16};

Task/Gotchas/C/gotchas-3.c

@@ -0,0 +1,4 @@
+int foo[4] = {4,8,12,16};
+int x = foo[0];  //x = 4
+int y = foo[3];  //y = 16
+int z = foo[4];  //z = ?????????

Task/Gotchas/C/gotchas-4.c

@@ -0,0 +1,5 @@
+int foo()
+{
+char bar[20];
+return sizeof(bar);
+}

Task/Gotchas/C/gotchas-5.c

@@ -0,0 +1,7 @@
+int foo()
+{
+#define size_of_bar 20  //the sizeof operator is the same as doing this essentially.
+
+char bar[size_of_bar];
+return size_of_bar;
+}

Task/Gotchas/C/gotchas-6.c

@@ -0,0 +1,4 @@
+int gotcha(char bar[])
+{
+return sizeof(bar);
+}

Task/Gotchas/C/gotchas-7.c

@@ -0,0 +1,2 @@
+myArray[40];
+int x = gotcha(myArray);

Task/Gotchas/C/gotchas-8.c

@@ -0,0 +1,2 @@
+myArray[40];
+int x = gotcha(&myArray[0]);

Task/Gotchas/C/gotchas-9.c

@@ -0,0 +1,7 @@
+int foo(char buf[],int length){}
+
+int main()
+{
+char myArray[30];
+int j = foo(myArray,sizeof(myArray)); //passes 30 as the length parameter.
+}