C Program to calculate tax for male and female using if-else condition

#include
#include
void main()
{
char g,m,f;
float bs,tax;
printf("enter gender");
scanf("%c",&g);
printf("enter basic salary");
scanf("%f",&bs);
if(g==m)
{
if(g==f)
{
printf("gender is female");
tax=(40.0*bs)/100.0;
}
else
{
printf("gender is male");
tax=(20.0*bs)/100.0;
}
}
printf("tax=%f",tax);
}