[완료]expected unqualified-id before '{' token 은 함수 중복을 의미하는 에러가 아닌가요?

#include <stdio.h>
 
int func_Plus(int plus_a, int plus_b)
{
	int plus_sum = plus_a + plus_b;
 
	return plus_sum;
}
 
int func_Minus(int minus_a, int minus_b);
{
	int minus_sum = minus_a - minus_b;
 
	return minus_sum;
}
 
int func_Product(int product_a, int product_b)
{
	int product_sum = product_a * product_b;
 
	return product_sum;
}
 
int func_Devide(int devide_a, int devide_b)
{
	int devide_sum = devide_a / devide_b;
 
	return devide_sum;
}
 
 
void Main()
{
	int a, b, c;
	printf("1 = 더하기 2 = 빼기 3 = 곱하기 4 = 나누기");
	printf("명령 입력 :");
	scanf("%d\n", &c);
 
	printf("a 입력 :");
	scanf("%d\n", &a);
	printf("b 입력 :");
	scanf("%d\n", &b);
	if(c == 1){
			printf("%d", func_Plus(a, b));
		}
 
	if(c == 2){
			printf("%d", func_Minus(a, b));
		}
 
	if(c == 3){
			printf("%d", func_Product(a, b));
		}
	if(c == 4){
			printf("%d", func_Devide(a, b));
		}
	if(c > 4){
			printf("System error. please restart.");
		}
 
	return;
}