#include <stdio.h>
int main() {
    int score;
    while(scanf("%d",&score)!=EOF) //多组输入，直到没有输入值就停止
    {
        if(score>=60)
        {
            printf("Pass\n");
        }
        else 
        {
            printf("Fail\n");
        }
    }    
}

#include <stdio.h>
int main() {
    int num1 =0;
    while(scanf("%d",&num1)!=EOF){
        if(num1%2==0){      //一个数%2==0就是偶数
            printf("Even\n");
        }else if(num1%2==1){
            printf("Odd\n");  //一个数%2==1就是奇数
        }
    }
}

#include <stdio.h>
int main() {
    int a,b,c;
    int max = 0;
    scanf("%d %d %d",&a,&b,&c);
    max = (a>b)?((a>c)?a:c):((b>c)?b:c); 
    printf("%d",max);![在这里插入图片描述](https://ucc.alicdn.com/images/user-upload-01/7943bfd584584e0083d56cb429daec4c.png)
    return 0;
}

#include <stdio.h>
int main() {
    char input;
    while(scanf("%c",&input)!=EOF)
    {
        if(input=='\n')   //遇到\n需要过滤掉
        {
            continue;
        }
        if(input=='a'||input=='A'||input=='e'||input=='E'||input=='i'||input=='I'||input=='o'||input=='O'||input=='u'||input=='U')
        {
            printf("Vowel\n");
        }
        else 
        {
            printf("Consonant\n");
        }
    }
}

#include <stdio.h>
int main() {
    char input;
    while(scanf("%c",&input)!=EOF)
    {
        if(input=='\n')
        {
            continue;
        }
        if((input>=65&&input<=90)||(input>=97&&input<=122))//字符底层用ascii码存储，大写字母ascii码范围是65-90，小写字母是97-122
        {
            printf("%c is an alphabet.\n",input);
        }
        else 
        {
            printf("%c is not an alphabet.\n",input);
        }
    }
}

#include <stdio.h>
int main() {
    char ch;
    while(scanf("%c",&ch)!=EOF)
    {
        if(ch>=65&&ch<=90)
        {
            printf("%c\n",ch+32); //大写字母+32就是小写字母 参考上面ascii码表
        }
        if(ch>=97&&ch<=122)
        {
            printf("%c\n",ch-32); //小写字母-32就是大写字母
        }
    }
}

#include <stdio.h>
int main() {
    int num1=0;
    int num2=0;
    while(scanf("%d %d",&num1,&num2)!=EOF){ //多组输入直到停止输入为止 oj系统会帮助你停止
        if(num1>num2){
            printf("%d>%d\n",num1,num2);
        }else if(num1<num2){
            printf("%d<%d\n",num1,num2);
        }else{
            printf("%d=%d\n",num1,num2);
        }
    }
}

#include <stdio.h>
int main() {
    int t;
    while(scanf("%d",&t)!=EOF)
    {
        if(t>0)
        {
            printf("1\n");
        }
        else if(t==0)
        {
            printf("0.5\n");
        }
        else
        {
            printf("0\n");
        }
    }    
}

#include <stdio.h>
int main() {
    int a = 0, b = 0, c = 0;
    while(~scanf("%d %d %d",&a, &b,&c))
    {
        if(a==b&&b==c)
        {
            printf("Equilateral triangle!\n");
        }
        else if((a==b||a==c||b==c)&&(a+b>c && a+c>b && b+c>a))
        {
            printf("Isosceles triangle!\n");
        }
        else if( a+b>c && a+c>b && b+c>a)
        {
            printf("Ordinary triangle!\n");
        }
        else 
        {
            printf("Not a triangle!\n");
        }
    }
}

#include <stdio.h>
int main() {
    int weight,height;
    while(scanf("%d %d",&weight,&height)!=EOF)
    {
        float bmi = weight*1.0/(height*height/10000.0);
        if(bmi<18.5)
        {
            printf("Underweight\n");
        }
        else if(bmi>=18.5&&bmi<=23.9)
        {
            printf("Normal\n");
        }
        else if(bmi>23.9&&bmi<=27.9)
        {
            printf("Overweight\n");
        }
        else
        {
            printf("Obese\n");
        }
    }
}