int main() {int grade;printf("請輸入成績"); scanf("%d",&grade); if(grade<0&&grade>100) { printf("輸入錯誤"); } 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("這個五位數是回文數\n");
}
else
{
?printf("這個五位數不是回文數\n");
?}?
?return 0;
?}




int main()
{
?int grade;
?printf("請輸入成績");
?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("該數是五位數，逆序為%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("該數是四位數，逆序為%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("該數是三位數，逆序為%d\n",e);
??}
??else if(a>=10&&a<99)
??{
???b=a/10;
???c=a%10;
???d=c*10+b;
???printf("該數是二位數，逆序為%d\n",d);
??}
??else
??{
???printf("該數是一位數，逆序為%d\n",a);
??}
?}
?return 0;
} int main()
{
??? int grade;
??? printf("請輸入成績");
??? scanf("%d",&grade);
??? if(grade<0&&grade>100)
??? {
??????? printf("輸入錯誤");
??? }
??? 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;
??? }

?

轉載于:https://www.cnblogs.com/1998li/p/5962309.html

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