Select structural programming

The first 1 Turn off ： Sort

• Task description
• Related knowledge
  • Input format
  • Output
• Programming requirements
• Test instructions

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Task description

Our mission ： The following program is to input three integers from the keyboard and output them in descending order .

To avoid formatting errors , Please directly copy and paste the format string and prompt information given in the title into your program .

Related knowledge

Input format

The input format is as follows ：

printf(" Please enter three integers :");
scanf("%d%d%d",&a,&b,&c);

Output

Sorting outputs three integers from small to large .

The output format is as follows ：

printf(" From small to large, the order is :%d,%d,%d",a,b,c);

Programming requirements

Please read the code on the right , Combined with relevant knowledge , stay Begin-End Code supplement within the area , Finish writing sorting applet .

Test instructions

The platform will run tests on your code , If the actual output is the same as the expected output , Customs clearance .

The sample input ：

Please enter three integers :5 7 6

Sample output ：

From small to large, the order is :5,6,7

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Start your mission , wish you success ！

#include<stdio.h>
	int main()
	{  
	  int a,b,c,t;
	  printf(" Please enter three integers :");
      scanf("%d%d%d",&a,&b,&c);
	  if(a>b)
	  {
		  t=a;
		  a=b;
		  b=t;
	  }
	  if(a>c)
	  {
		  t=a;
		  a=c;
		  c=t;
	  }
	  if(b>c)
	  {
		  t=b;
		  b=c;
		  c=t;
	  }
	  printf(" From small to large, the order is :%d,%d,%d",a,b,c);
       return 0;
	}

	

The first 2 Turn off ： Selection structure - Leap year judgment

• Task description
• Related knowledge
  • Input
  • Output
  • The sample input
  • Sample output
• Programming requirements
• Test instructions

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Task description

Programming , Complete the following functions ： Enter any year from the keyboard year, Judge whether the year is a leap year .
** To avoid formatting errors , Please directly copy and paste the format string and prompt information given in the title into your program .**

Related knowledge

Input

Enter any year from the keyboard .

Output

Output according to leap year , It's output "**** It's a leap year ！", No output "**** It's not a leap year ！", among **** Is the year currently entered .

The sample input

2000

Sample output

2000 It's a leap year ！

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Start your mission , wish you success ！

Programming requirements

Please read the code on the right , Combined with relevant knowledge , stay Begin-End Code supplement within the area , Finish writing the selection structure - Leap year judgment applet .

Test instructions

The platform will run tests on your code , If the actual output is the same as the expected output , Customs clearance .

#include<stdio.h>
	int main(void)
	{  
	  int year;
	  scanf("%d",&year);
	  if((year%4==0)&&(year%100!=0)||(year%400==0))
	  {
	   printf("%d  It's a leap year ！",year);
	  }
	  else
	  {
	   printf("%d  It's not a leap year ！",year);
	  }
       return 0;
	}

The first 3 Turn off ： Selection structure - Piecewise function problem

• Task description
• Related knowledge
  • Input
  • Output
• Programming requirements
• Test instructions

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Task description

Our mission ： Programming , According to the entered value , The value of the output function .

There is a function , The definition is as follows

Write a program , Input x, Output y.

Related knowledge

Input

Enter any number from the keyboard x

Output

a number y, Keep three decimal places .

Programming requirements

Please read the code on the right , Combined with relevant knowledge , stay Begin-End Code supplement within the area , Finish writing the selection structure - Piecewise function problem applet .

Test instructions

The platform will run tests on your code , If the actual output is the same as the expected output , Customs clearance .
The sample input ：

14

Sample output ：

181.000

 

#include<stdio.h>
int main(void)
{
	float x,y;
	scanf("%f",&x);
	if(x<0&&x!=-3)
	{
		y=x*x+x-6;
		printf("%.3f",y);
	}
	else if(x>=0&&x<10&&x!=2&&x!=3)
	{
		y=x*x-5*x+6;
		printf("%.3f",y);
	}
	else 
	{
		y=x*x-x-1;
		printf("%.3f",y);
	}
    return 0;
}

The first 4 Turn off ： Student grade conversion

• Task description
• Related knowledge
  • Input
  • Output
• Programming requirements
• Test instructions

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Task description

Our mission ： Give a 100 point mark , Output grade is required A、B、C、D、E. 90 The above points are A80-89 It is divided into B70-79 It is divided into C60-69 It is divided into D60 It is divided into the following E, If the input data is not in 0~100 Within the scope of , Please output one line ：“Score is error!”.

Related knowledge

Input

Enter a score from the keyboard , Grades can make floating point numbers .

Output

(1) If the input data is in 0 To 100 Within the scope of ： A character , Indicates the grade .
(2) If the input data is not in 0~100 Within the scope of , Please output one line ：“Score is error!”.

Programming requirements

Please read the code on the right , Combined with relevant knowledge , stay Begin-End Code supplement within the area , Complete the preparation of student grade conversion procedures .

Test instructions

The platform will run tests on your code , If the actual output is the same as the expected output , Customs clearance .

The sample input ：

90

Sample output ：

A

#include<stdio.h>
	int main(void)
{  
	int score,grade;
	scanf("%d",&grade);
	if(grade>=90&&grade<=100)
	 {
		printf("A\n");
	 }
	 if(grade>=80&&grade<90)  
	 {
		printf(" B\n");
	 }
     if(grade>=70&&grade<80)
     {
		printf(" C\n");
	 }
     if(grade>=60&&grade<70)
     {
		printf(" D\n");
	 }
     if(grade<60&&grade>=0)
     {
		printf(" E\n");
	 }
     if(grade>100||grade<0)
	 {
		printf("Score is error! \n");
	 }
       return 0;
}