Скачать или смотреть This Common C Programming Mistake Will Crash Your Code! Can You Debug It?

If you’re learning C programming, here’s a classic mistake that almost every beginner makes:

int main() {
printf("Sum is: %d", x + 5);
return 0;
}
❓ What’s the bug in this code?
✅ Correct Answer: The variable x is used without being declared.
In C, every variable must be declared before it's used. Using an undeclared variable like x results in a compile-time error. To fix it, you must declare and optionally initialize x:
int x = 10;
Then the program will correctly print:
Sum is: 15
💡 Why it matters: This error highlights the importance of variable declarations, scope, and compiler behavior in C. It's a great example of how one missing line can break an entire program!
Perfect for students, coding test prep, and debugging practice!

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