2014.8.16 if statement

Statement

If statement

There are several types of data:

 

Example:

(1) determine whether to pay taxes based on monthly income

Console. Write ("Enter your monthly income (RMB ):");

Double money = convert. todouble (console. Readline ());

If (money >=3500)

{

Console. writeline ("Please pay taxes ");

Console. writeline ("Thank you for your cooperation! ");

}

Else

{

Console. writeline ("continue to work ");

Console. writeline ("Thank you for your cooperation! ");

}

(2) Determine whether the woman is married to the man based on the house, money, and Ability

Try

{

Console. Write ("Do you have a room (true/false )? ");

Bool House = convert. toboolean (console. Readline ());

If (House = true)

{

Console. writeline ("Oh, let's get married !!!! ");

}

Else

{

Console. Write ("are you rich (true/false )? ");

Bool money = convert. toboolean (console. Readline ());

If (money = true)

{

Console. writeline ("Buy a house first and then get married! ");

}

Else

{

Console. Write ("are you competent (true/false )? ");

Bool ability = convert. toboolean (console. Readline ());

If (ability = true)

{

Console. writeline ("Cool, please make some money first! ");

}

Else

{

Console. writeline ("Get out !!!!!! ");

}

}

}

}

Catch

{

Console. writeline ("input error! ");

}

(3) Calculate the root of ax ^ 2 + bx + c = 0

Try

{

Console. writeline ("Calculate the root of ax ^ 2 + bx + c = 0 ");

Console. Write ("A = ");

Int A = convert. toint32 (console. Readline ());

Console. Write ("B = ");

Int B = convert. toint32 (console. Readline ());

Console. Write ("c = ");

Int c = convert. toint32 (console. Readline ());

If (A = 0)

{

Console. writeline ("not a quadratic equation! ");

}

Else

{

Int Delta = B * B-4 * a * C;

If (delta> 0)

{

Console. writeline ("X1 = {0}, X2 = {1}", (-B + math. SQRT (DELTA)/2 * A), (-B-math. SQRT (DELTA)/2 * ));

}

Else if (delta = 0)

{

Console. writeline ("x =" +-B/2 * );

}

Else

{

Console. writeline ("the equation has no real root! ");

}

}

}

Catch

{

Console. writeline ("incorrect input ");

}

(4) Input height and weight to determine the health status

Try

{

Console. writeline ("Enter height and weight to determine health ");

Console. Write ("Enter Gender :");

String sex = console. Readline ();

Console. Write ("Enter Height :");

Int Height = convert. toint32 (console. Readline ());

Console. Write ("Enter weight :");

Int Weight = convert. toint32 (console. Readline ());

If (sex = "male ")

{

Int num = height-100-weight;

If (Num> 3)

{

Console. writeline ("thin ");

}

Else if (Num> =-3 & num <= 3)

{

Console. writeline ("normal ");

}

Else

{

Console. writeline ("Overweight ");

}

 

}

Else if (sex = "female ")

{

Int num1 = height-110-weight;

If (num1> 3)

{

Console. writeline ("thin ");

}

Else if (num1> =-3 & num1 <= 3)

{

Console. writeline ("normal ");

}

Else

{

Console. writeline ("Overweight ");

}

}

}

Catch

{

Console. writeline ("incorrect input! ");

}