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education/software development/ECE1400/Chapter 7 Exercises.md

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+> 3. Which of the following aren not legal types in C?
+
+a. `short unsigned int`
+b. `short float`
+c. `long double`
+d. `unsigned long`
+
+Answer:
+b. `short float`
+
+> 4. If `c` is a variable of type `char`, which of the following statements is illegal?
+
+```c
+char c;
+// A:
+i += c; // i has type int
+// B:
+c = 2 * c - 1;
+// C:
+putchar(c);
+// D:
+printf(c);
+```
+
+Answer:
+D is illegal because `printf` operates on strings, not `char`s.
+
+> 6. For each of the following items of data, specify which one of the types `char`, `short`, `int`, or `long`is the smallest one guaranteed to be large enough to store the item.
+
+Answer:
+A. Days in a month: `char`
+B. Days in a year: `short`
+C. Minutes in a day: `short`
+D. Seconds in a day: `long`
+
+> 10. Suppose that `i` is a variable of type `int`, `j` is a variable of type `float`, and `k` is a variable of type `unsigned int`. What is the type of the expression `i + (int) j * k`?