试着编写了程序 但是编译是老有一个错误，学得不精找不到错误在哪里，求指导。
#include <stdio.h>

int main(void)

{ long int i;
 
  long int bonus1,bonus2,bonus4,bonus6,bonus10,bonus;

  scanf("%ld", &i);
 
  bonus1 = 100000*0.1;
  bonus2 = bonus1 + 100000*0.075;
  bunus4 = bonus2 + 200000*0.05;
  bonus6 = bonus4 + 200000*0.03;
  bonus10 = bonus6 + 400000*0.015;
  if(i<=100000)
      bonus = i*0.1;
      else if(100000< i <= 200000)
          bonus = bonus1 + (i - 100000)*0.075;
             else if(200000< i <= 400000)
                  bonus = bonus2 + (i - 200000)*0.05;
                      else if(400000< i <= 600000)
                         bonus = bonus4 + (i - 400000)*0.03;
                            else if(600000< i <= 1000000)
                               bonus = bonus6 + (i - 600000)*0.015;
                                  else if(i>1000000)
                                      bonus = bonus10 + (i - 1000000)*0.01;

                                  printf("bonus = %d\n", bonus);
                                  return 0;
}

bunus4这个写错了吧，你定义的是bonus4

嗯~~楼上正解！！！

我太 了，眼睛都看花，解决了。谢谢