#include<stdio.h>int main(){    int a,b,c,t;    printf("请输入三个整数");    scanf("%d%d%d",&a,&b,&c);    if(a<b){        t=a;        a=b;        b=t;        }  if(b>c)  {        printf("%d\t%d\t%d\n",a,b,c);}  else if(c<a){      printf("%d\t%d\t%d\n",c,a,b); }  else{      printf("%d\t%d\t%d\n",a,b,c);  }  return 0;  }

# include <stdio.h> # include <math.h> int main(void){   double x, y;    printf("输入 x:");   scanf("%lf", &x);    if (x >4){       y = sqrt(x-4);   }   else if (x <-5){       y =fabs(x);   }   else{      y = x+3;   }   printf("结果= %.2f\n",  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 <math.h> int main(void){   double x, y;    printf("输入 x:");   scanf("%lf", &x);    if (x >=10){       y = (3*x)-11;   }   else if (x <1){       y =x;   }   else {      y = (2*x)-11;   }   printf("结果= %.2f\n",  y);return 0;}

# include <stdio.h> int main(){    int a;    printf("请输入成绩；");    while(scanf("%d",&a)   &&  a >= 0  &&  a <= 100)    if(a>=90)        {printf("A");}    else if(a<=89&a>=80){        printf("B");}    else if(a<=79&a>=70)        {printf("C");}    else if(a<=69&a>=60){    printf("D");        }    else if(a<60){    printf("E");        }}