2-1
#include<stdio.h>
int main(){
int a,b,c,t;
scanf("%d%d%d",&a,&b,&c);
if(a<b){
t=a;
a=b;
b=t;
}
if(b>c){
printf("%d %d %d ",a,b,c);
}
else if(c>a){
printf("%d %d %d ",c,a,b);
}
else{
printf("%d %d %d ",a,c,b);
}
return 0;
}
2-2
#include<stdio.h>
#include<math.h>
int main()
{
int x;
float y;
scanf("%d",&x);
if(x>4){
printf("%f",y=sqrt(x-4));
}
else if(x<-5){
printf("%f",y=fabs(x));
}
else{
printf("%f",y=x+3);
}
return 0;
}
2-3
#include<stdio.h>
int main()
{
char temp;
scanf("%c",&temp);
if(temp>='a'&&temp<='z'){
temp-=32;
}
else if('A'<=temp&&temp<='Z'){
temp+=32;
}
printf("%c",temp);
return 0;
}
2-4
#include<stdio.h>
#include<math.h>
int main()
{
int x,y;
scanf("%d",&x,&y);
if(x<1){
printf("%d",y=x);
}
else if(x<10&&x>=1){
printf("%d",y=2*x-1);
}
else{
printf("%d",y=3*x-11);
}
return 0;
}
2-5
#include<stdio.h>
int main()
{
int score;
scanf("%d",&score);
if(score>=90&&score<=100){
printf("A");}
else if(score>=80&&score<=89){
printf("B");}
else if(score>=70&&score<=79){
printf("C");}
else if(score>=60&&score<=69){
printf("D");}
else if(score>=0&&score<=59){
printf("E");}
return 0;
}
