所以，当我按n时，我希望循环停止工作。但似乎do / while循环存在问题。循环继续工作，无需等待ch（char）的输入。如果你们能帮助我，我们将不胜感激。预先感谢。
*注意：这是我的作业。我只能使用do / while循环和函数。
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
void input();
void output(int id,char *name,float salary);
void calculate(float salary);
int main(){
system("cls");
int ch;
input();
getch();
return 0;
}
void input(){
char ch;
do{
int id;
float salary,tax;
char name[30];
printf("Input Id :"); scanf("%d",&id);
printf("Input Name: "); fflush(stdin); gets(name);
printf("Input Salary :"); scanf("%f",&salary);
output(id,name,salary);
calculate(salary);
printf("Press n to stop : "); scanf("%c",&ch);
}while(ch != 'n' );
}
void calculate(float salary)
{
float tax;
float asalary;
if(salary < 200)
tax = salary * (0.1/100);
if(salary > 200 && salary < 499)
tax = salary * (1.5/100);
if(salary > 499 && salary < 999)
tax = salary * (2.5/100);
if(salary > 999 && salary < 1999)
tax = salary * (3.5/100);
if(salary > 200)
tax = salary * (4.1/100);
asalary = salary - tax;
printf("\n Tax you have to pay is %.2f",tax);
printf("\n Your salary after tax is %.2f",asalary); }
void output(int id,char *name,float salary)
{
printf("ID: %d\n",id);
printf("Name: %s\n",name);
printf("Salary: %.2f\n",salary);
}