int main()
{
int grade;
printf("请输入成绩");
scanf("%d",&grade);
if(grade<0&&grade>100)
{
printf("输入错误");
}
if(grade>=90)
{printf("A");
}
else if(grade>=80&&grade<=89)
{printf("B");
}
else if(grade>70&&grade<=79)
{printf("C");
}
else if(grade>=60&&grade<=69)
{printf("D");
}
else if(grade<60&&grade>=0)
{printf("E");
}
return 0;
}
scanf("%d",&e);
a=e/10000;
b=e%10000/1000;
c=e%100/10;
d=e%10;
if(a==d&&b==c)
{printf("这个五位数是回文数\n");
}
else
{
printf("这个五位数不是回文数\n");
}
return 0;
}
int main()
{
int grade;
printf("请输入成绩");
scanf("%d",&grade);
switch(grade/10)
{
case 9:printf("A\n");break;
case 8:printf("B\n");break;
case 7:printf("C\n");break;
case 6:printf("D\n");break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:printf("E/n");break;
default:printf("error");
}
return 0;
}
scanf("%d",&a) ;if(a>=100000||a<0)
{
printf("error\n");
}
else
{
if(a>=10000&&a<99999)
{
b=a/10000;
c=a/1000%10;
d=a/100%10;
e=a/10%10;
f=a%10;
g=f*10000+e*1000+d*100+c*10+b;
printf("该数是五位数,逆序为%d\n",g) ;
}
else if(a>=1000&&a<9999)
{
b=a/1000;
c=a/100%10;
d=a/10%10;
e=a/10;
f=e*1000+d*100+c*10+b;
printf("该数是四位数,逆序为%d\n",f);
}
else if(a>=100&&a<999)
{
b=a/100;
c=a/10%10;
d=a%10;
e=d*100+c*10+b;
printf("该数是三位数,逆序为%d\n",e);
}
else if(a>=10&&a<99)
{
b=a/10;
c=a%10;
d=c*10+b;
printf("该数是二位数,逆序为%d\n",d);
}
else
{
printf("该数是一位数,逆序为%d\n",a);
}
}
return 0;
}
int main()
{
int grade;
printf("请输入成绩");
scanf("%d",&grade);
if(grade<0&&grade>100)
{
printf("输入错误");
}
if(grade>=90)
{printf("A");
}
else if(grade>=80&&grade<=89)
{printf("B");
}
else if(grade>70&&grade<=79)
{printf("C");
}
else if(grade>=60&&grade<=69)
{printf("D");
}
else if(grade<60&&grade>=0)
{printf("E");
}
return 0;
}
{
int grade;
printf("请输入成绩");
scanf("%d",&grade);
if(grade<0&&grade>100)
{
printf("输入错误");
}
if(grade>=90)
{printf("A");
}
else if(grade>=80&&grade<=89)
{printf("B");
}
else if(grade>70&&grade<=79)
{printf("C");
}
else if(grade>=60&&grade<=69)
{printf("D");
}
else if(grade<60&&grade>=0)
{printf("E");
}
return 0;
}