C # Base 1,100 within the 7-related numbers; 2, calculator, 3, judging is not a positive integer, 4, judging weight

Source: Internet
Author: User
Tags switch case try catch

Output statement console.readline ();
Input statement Console.WriteLine ();
add annotations to functions;
/**///Area
Data type
1, int integer;
2, floating-point double;
3, String type;
4, Boolean bool (1) True (2) false;

C # escape character
(1) \ nthe newline (2) \ r Enter (3) \ t Horizontal tab

Operator
(1) Gaga + + +
(2) minus minus--
(3) multiplication to take surplus */%
(4) plus minus-
(5) greater than +; >; less than <; Greater than or equal to >=; less than equals <=;
(6) equals = =; not equal to! = =;
(7) and (and) &&;
(8) or | | ;
(9) Non-!;
(1) previous + + explanations;
(2) after + + + explanation; plus repeated self-added

Examples
Numbers within 1,100 and 7
Console.Write ("Please enter a number within 100");
int s = Convert.ToInt32 (Console.ReadLine ());
if (s%7==0| | s%10==7| | S/10==7)
//{
Console.WriteLine (s+ "With regard to 7");
//}
else if (true)
//{
Console.WriteLine (s+ "unrelated to 7");
//}
Console.ReadLine ();

           //Examples
            ////2, Calculator
            //console.write ("Please enter a number");
           //int a = Convert.ToInt32 (Console.ReadLine ( ));
           //console.write ("Please enter a number again");
           //int b = Convert.ToInt32 (Console.ReadLine ( ));
           //int C = a + B; The result of
           //console.writeline (a+b+ ") is" +c ";//Arithmetic addition, Multiplication becomes *, division becomes/, subtraction becomes-;

Grammar
SELECT statement If,else;switch case;
Cyclic statement do,for;foreach;while;
Jump Statement Break,continue,return;
Exception statement try catch, finally;


Examples
1, enter a positive integer to determine if it is not a positive integer
Console.Write ("Please enter an integer");
int a = Convert.ToInt32 (Console.ReadLine ());
if (a>=10&&a<100)
//{
Console.WriteLine ("Then this number is a positive integer");
//}
if (a < 10)
//{
Console.WriteLine ("Then this number is negative");
//}
Else
//{
Console.WriteLine ("You have entered a number greater than or equal to 100");
//}
Console.ReadLine ();

2, enter the score to determine whether the pass,
Console.Write ("Please enter name");
String a = Console.ReadLine ();
Console.Write ("Please enter a score");
int b = Convert.ToInt32 (Console.ReadLine ());
if (b>=80&&b<100)
//{
Console.WriteLine ("You learn well, deserve praise");
} if (b>50&&b<=60)
//{
Console.WriteLine ("Just a little bit, refueling");
} if (B&LT;50)
//{
Console.WriteLine ("Try hard, don't be lazy");
//}
Console.ReadLine ();
3, one-yuan two-time equation
ax*x+bx+c=0;
4, Standard weight
Console.Write ("Please enter gender");
String S=console.readline ();
Console.Write ("Please enter weight (kg)");
Double t=convert.todouble (Console.ReadLine ());
Console.Write ("Please enter height (cm)");
Double g=convert.todouble (Console.ReadLine ());
if (s== "male")
//{
Double n=t-g+100;
if (n>=-3&&n<=3)
//{
Console.Write ("You are the standard weight");
//}
else if (n>3)
//{
Console.Write ("You need to lose weight");
}else
//{
Console.Write ("You're too skinny");
//}
//}
else if (s== "female")
//{
Double N=t-g +100;
if (n>=3&&n<=3)
//{
//     {
Console.Write ("You are the standard weight");
//}
else if (n>3)
//{
Console.Write ("You need to lose weight");
}else
//{
Console.Write ("You're too skinny");
//}
Console.ReadLine ();

C # Base 1,100 within the 7-related numbers; 2, calculator, 3, judging is not a positive integer, 4, judging weight

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.