求助c++

#include <stdio.h>
/*统计各成绩段人数*/
main()
{
int score,i;
int grade[6];
for (i=0;i<6;++i)
grade[i]=0;
printf(“请输入第一个学生的成绩\n”);
scanf("%d",&score);
while (score!=-1;)
{
if (score>=0&&score<60)
{
grade[0]++;
}
else if (score>=60&&score<70)
{
grade[1]++;
}
else if (score>=70&&score<80)
{
grade[2]++;
}
else if (score>=80&&score<90)
{
grade[3]++;
}
else if (score>=90&&score<100)
{
grade[4]++;
}
else if (score==100)
{
grade[5]++;
}
printf ("请输入下一个学生的成绩，输入-1表示输入结束\n")
scanf ("%d",&score;);
}
printf ("各成绩段的人数分别如下：\n");
for (i=0,i<6;++i)
printf ("%d\n",grade[i]);
}
我们老师叫我们把例题在c++上敲一遍。
然后调试的时候错误百出
显示了
--------------------Configuration: 例2-2 - Win32 Debug--------------------
Compiling...
例2-2.cpp
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xa1'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xb0'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xc7'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xeb'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xca'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xe4'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xc8'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xeb'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xb5'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xda'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xd2'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xbb'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xb8'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xf6'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xd1'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xa7'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xc9'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xfa'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xb5'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xc4'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xb3'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xc9'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xbc'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xa8'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2017: illegal escape sequence
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xa1'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2018: unknown character '0xb1'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(9) : error C2065: 'n' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(11) : error C2143: syntax error : missing ')' before ';'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(11) : error C2059: syntax error : ')'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(38) : error C2146: syntax error : missing ';' before identifier 'scanf'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(38) : error C2143: syntax error : missing ')' before ';'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(38) : error C2059: syntax error : ')'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(41) : error C2143: syntax error : missing ';' before ')'
C:\Documents and Settings\Administrator\桌面\例2-2.cpp(43) : warning C4508: 'main' : function should return a value; 'void' return type assumed
执行 cl.exe 时出错. 例2-2.obj - 1 error(s), 0 warning(s)
求指教了 大家
拜托