C # example: write a program to test the standard height and weight, input the date year month day, calculate the day of the year (considering the leap year ),

C # example: write a program to test the standard height and weight, input the date year month day, calculate the day of the year (considering the leap year ),

I. switchStatement exercise example

// Compile a program to test the standard height and weight.

// Calculation formula:

// Men's standard weight (kg) = height (cm)-105;

// Women's standard weight (kg) = height (cm)-100;

// Project requirements:

// Start the program, and the text prompts you to select a gender.

// (1) male (2) Female

// Text prompt, enter the height and weight.

// Output the standard weight after user input

// Give a comment:

// Actual weight/standard weight-Proportion

// Severe malnutrition with a standard weight of less than 60%

// The standard weight is 60% ~ 80% moderate malnutrition

// Weight 80% ~ 90% mild malnutrition

// The standard weight is 90% ~ 110% is normal

// The standard weight is 110% ~ 120% Mild Obesity

// Standard weight: 120% obesity

Console. WriteLine ("select gender 1: Male \ t2: female ");

Intgender = int. Parse (Console. ReadLine ());

Console. WriteLine ("Enter height ");

Intheight = int. Parse (Console. ReadLine ());

Console. WriteLine ("Enter the weight ");

Intweight = int. Parse (Console. ReadLine ());

IntstanderWeight = 0;

Switch (gender)

{

Case1:

StanderWeight = height-105;

Break;

Case2:

StanderWeight = height-100;

Break;

Default:

Console. WriteLine ("this gender does not exist ");

Break;

}

Floatrate = weight * 1.0f/standerWeight; // * 1.0f, which is converted into a decimal number and must be added with f

If (rate <0.6f) // f can be added or not

{

Console. WriteLine ("severe malnutrition ");

}

Elseif (rate <0.8f) // otherwise, it includes rate> = 0.6 & rate <0.8

{

Console. WriteLine ("moderate malnutrition ");

}

Elseif (rate <0.9)

{

Console. WriteLine ("mild malnutrition ");

}

Elseif (rate <1.1)

{

Console. WriteLine ("normal ");

}

Elseif (rate <1.2)

{

Console. WriteLine ("Mild Obesity ");

}

Else

{

Console. WriteLine ("Obese ");

}

Ii. goto jump statement

Inttimes = 0;

Times ++;

Console. WriteLine ("hello world" + times );

Gotolabel;

Example 1:

// Enter a date, year, month, and day to calculate the day of the year (considering the leap year)

1. // method 2

Console. WriteLine ("Enter year ");

Intyear = int. Parse (Console. ReadLine ());

Console. WriteLine ("Enter month ");

Intmonth = int. Parse (Console. ReadLine ());

Console. WriteLine ("input date ");

Intday = int. Parse (Console. ReadLine ());

// Record the accumulated days

InttotalDays = 0;

Switch (month)

{

Case12:

TotalDays + = 30;

Gotocase11;

Case11:

TotalDays + = 31;

Gotocase10;

Case10:

TotalDays + = 30;

Gotocase9;

Case9:

TotalDays + = 31;

Gotocase8;

Case8:

TotalDays + = 31;

Gotocase7;

Case7:

TotalDays + = 30;

Gotocase6;

Case6:

TotalDays + = 31;

Gotocase5;

Case5:

TotalDays + = 30;

Gotocase4;

Case4:

TotalDays + = 31;

Gotocase3;

Case3:

TotalDays + = 28; // determines whether it is a leap year;

If (year % 4 = 0 & amp; year % 100! = 0) | year % 400 = 0)

{

TotalDays ++;

}

Gotocase2;

Case2: /// add the number of days in January to the number of days in case1, that is, the number of days.

TotalDays + = 31;

Gotocase1;

Case1: // It must be written in reverse mode because break exists;

TotalDays + = day;

Break;

Default:

Break;

}

Console. WriteLine ("{0}-{1}-{2}-{3} day of this year", year, month, day, totalDays );

2. Method 1: implemented using the if else statement. (The above program functions)

Console. WriteLine ("Enter the year ");

Intyear = int. Parse (Console. ReadLine ());

Console. WriteLine ("Enter the month ");

Intmonth = int. Parse (Console. ReadLine ());

Console. WriteLine ("Enter the date ");

Intday = int. Parse (Console. ReadLine ());

// Record the accumulated days

// 2 20

InttotalDays = 0;

TotalDays + = day;

Month-= 1;

If (month = 11)

{

TotalDays + = 30;

Month-= 1;

}

If (month = 10)

{

TotalDays + = 31;

Month-= 1;

}

If (month = 9)

{

TotalDays + = 30;

Month-= 1;

}

If (month = 8)

{

TotalDays + = 31;

Month-= 1;

}

If (month = 7)

{

TotalDays + = 31;

Month-= 1;

}

If (month = 6)

{

TotalDays + = 30;

Month-= 1;

}

If (month = 5)

{

TotalDays + = 31;

Month-= 1;

}

If (month = 4)

{

TotalDays + = 30;

Month-= 1;

}

If (month = 3)

{

TotalDays + = 31;

Month-= 1;

}

// The if condition that can be executed below must be greater than that in January

If (month = 2)

{

TotalDays + = 28;

Month-= 1;

// Determine whether a leap year is a leap year plus 1

If (year % 4 = 0 & amp; year % 100! = 0 | year % 400 = 0)

{

TotalDays ++;

}

}

If (month = 1)

{

TotalDays + = 31;

Month-= 1;

}

Console. WriteLine ("this is the day {0} of this year", totalDays );

III,Switch (day)

{

Case 1: // if the conditions are the same, the last one can be executed,

Case 2:

Case 3:

Case 4:

Case 5:

Console. WriteLine ("Today's workday ");

IV,// Score A, B, C, D, and E

Console. WriteLine ("Enter your score ");

Intscore = int. Parse (Console. ReadLine ());

Charlevel = 'a ';

Switch (score/10)

{

Case10:

Case9:

Level = 'a ';

Break;

Case8:

Level = 'B ';

Break;

Case7:

Level = 'C ';

Break;

Case6:

Level = 'D ';

Break;

Default:

Level = 'E ';

Break;

}

Console. WriteLine (level );