# include <stdio.h> int main(){    float a,b,c,m,n,l,k,j,i; 	printf("请输入三个数:\n");    scanf("%f %f %f",&a,&b,&c);     m = a > b ? a : c;    n = b > c ? b : c;    l = m > n ? m : n;    k = a < b ? a : b;    j = b < c ? b : c;    i = k < j ? k : j;         if (a > i && a < l)    {        printf("%f %f %f\n",l,a,i);    }    else if(b > i && b < l)    {        printf("%f %f %f",l,b,i);    }    else    {        printf("%f %f %f",l,c,i);    }     return 0;}

#include<stdio.h>#include<math.h>int main(){	float x,y;	printf("请输入x:\n");	scanf("%f",&x);	{	  	if(x>4)		y=sqrt(x-4);    	if(x<-5)		y=fabs(x);		if(x>=-5&x<=4)		y=x+3;		printf("%f",y);		} 	return 0;}

#include"stdio.h"int main(){   char ch;   printf("请输入一个字符：\n");   scanf("%c",&ch);   printf("其大写字符是：%c\n",ch-32);}

#include<stdio.h>#include<math.h>int main(){	float x,y;	printf("ÇëÊäÈëx:\n");	scanf("%f",&x);	{	  	if(x<1)		y=(x);    	if(x>=1&x<=10)		y=(2*x-1);		if(x>10)		y=(3*x-11);		printf("%f",y);		} 	return 0;}

#include<stdio.h>int main(){	int a;	printf("请输入成绩:");	scanf("%d",&a);	if(a>100||a<0){	printf("????");}	else{	a=a/10;	switch(a){case 10:printf("A\n");break; case 9: printf("A\n");break;case 8: printf("B\n");break;case 7: printf("C\n");break;case 6: printf("D\n");break;default:printf("E\n");break;        }}return 0;}#include<stdio.h> int main(){    int n; 	printf("请输入成绩:");    scanf("%d",&n); 	if(n>90)  {    printf("A");  }    else if(n>=80 && n<=90)  {  	printf("B");  }    else if(n>=70 && n<=79)  {  	printf("C");   }    else if(n>=60 && n<=69)   {   	printf("D");   }    else   {   	printf("E");   } 	return 0;}