[완료]MinGW에서 undefined reference to `WinMain@16' 에러가 뜨네요.

#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;
}