In C++ (old-style iostream.h), a function with a default argument is called once and computes a factorial-like product. Predict the printed result.\n\n#include <iostream.h>\n\nlong FactFinder(long = 5);\n\nint main()\n{\n for (int i = 0; i <= 0; i++)\n cout << FactFinder() << endl; // calls FactFinder(5)\n return 0;\n}\n\nlong FactFinder(long x)\n{\n if (x < 2)\n return 1;\n long fact = 1;\n for (long i = 1; i <= x - 1; i++)\n fact = fact * i; // multiplies up to x-1\n return fact;\n}\n

Introduction / Context:
This question checks your understanding of default function arguments, loop bounds, and how an off-by-one choice in the loop makes the routine compute a product up to x - 1 rather than x. It also reinforces that the loop in main executes exactly once and calls the function with its default parameter value.

Given Data / Assumptions:

• Function prototype: long FactFinder(long = 5).
• Main calls FactFinder() once due to for (i = 0; i <= 0; i++).
• In FactFinder, if x < 2 return 1; otherwise multiply i from 1 to x - 1.
• Classic headers (iostream.h) are assumed to compile in the intended environment.

Concept / Approach:
Because the call uses the default, x is 5. The function multiplies numbers from 1 through 4 (not 5). That computes 1 * 2 * 3 * 4 = 24. It then returns this value, which is printed by cout from main, followed by a newline.

Step-by-Step Solution:

Verification / Alternative check:
If the loop were i <= x instead of i <= x - 1, the result would be 120 for x = 5. The present code intentionally stops early.

Why Other Options Are Wrong:

• The program will print the output 1.: This would require x < 2 or an empty product, which is not the case.
• The program will print the output 120.: That would need multiplication up to 5.
• The program will print the output garbage value.: All variables are initialized; no undefined reads occur.
• The program will report compile time error.: The code is valid in the assumed toolchain.

Common Pitfalls:
Confusing default-argument usage, assuming factorial(x) instead of factorial(x - 1), or thinking the for loop in main runs multiple times. Also, overlooking that the code prints once because the loop bound is i <= 0.

Final Answer:
The program will print the output 24.