C language LNK2019 unresolved external symbols_ Main error

LNK2019 Unresolved external symbols

#include <stdio.h>
#include <math.h>

void mian()
{
	double x, s;
	printf("input number:\n");
	scanf("%lf", &x);
	s = sin(x);
	printf("sin of %lf is %lf\n", x, s);
}

Upper code error ：  LNK2019     Unresolved external symbols _main, function "int __cdecl invoke_main(void)" ([email protected]@YAHXZ) The symbol is quoted in     

reason ：main Misspelling of words .

#include <stdio.h>
#include <math.h>

void main()
{
	double x, s;
	printf("input number:\n");
	scanf("%lf", &x);
	s = sin(x);
	printf("sin of %lf is %lf\n", x, s);
}