Weird midterm results

I've graded many tests from 2025. Here are the most hilarious results from C programming midterms.

2025. first midterm

Make sure to check if an int is NULL:

int i=0;
if(++i != null){
	...;
}
					

Absolute cinema:

if(bool = true){
	...;
}
					

just make sure to find that null terminator in that happy number check:

bool is_happy_number(int* ptr){
	while(*ptr != '\0'){
		...;
	}
}
					

The most useful ternary operator:

bool func(...){
	...;
	return p==1 ? true:false;
}
					

Saying symbols out loud in Hungarian:

include kacsacsőr stdio.h kacsacsőr
...;
					

strlen(int):

bool sum(int num){
	int digits = strlen(num);
	...;
}
					

A brilliant search algorithm which is O(1):

int find(int number){
	return number;
}
					

Return more! Not just once!:

...;
for(int i=0;i<10;i++){
	return;
}
					

The hell is this???:

int b=...;
b = b%;
					

A squared sum returning a boolean:

bool sqr_sum(int a);
					

You need that break really, do you?:

for(...){
	if(condition){
		return;
		break;
	}
}
					

No params and no output:

void is_prime(void);
					

I am pretty sure you don't check primes like this:

bool is_prime(int num){
	if(num%2 ==0){
		return true;
	}
	return false;
}
					

A guy had multiple mains??? For some reason, a void too:

int main(void){
	...;
}
...
int main(void){
	...;
}
...
void main(void){
	...;
}
...

					

Always check the int for a null terminator:

bool func(int num){
	if(num[0] =='\0'){
		return false;
	}
	...;
}
					

What the hell do you need that for:

int sum_of_number_digits(int * i[]){
	int sum = 0;
	for(int j=0;j

...;
while(!EOF){
	fgets(x,6,stdin);
	...;
}
...;
					

...;
scanf("%&0[EOF]",var);
...;