C language, Warning:return type of ' main ' is not ' int ' How to solve?

////警告可以忽略,但如果严格点的话#include#includeintmain(intargc, char*arg[]) ///标准C主函数原型{    floatx,y;    printf("Enter x:");    scanf("%f",&x);    if(x        y=pow(x,5)+2*x+1/x;    }    else{        y=sqrt(x);    }    printf("f(%.2f)=%.2f\n",x,y);       return0

Sublime Text3 compiling some configuration for running C,java program

Environment: Linux 64-bitDesktop environment: GnomeJava compilation run(1) Preferences--Browse Packages--Under this folder, create a new build file such as: Myjavac.sublime-build, paste the following code:{ "cmd": ["javac \ "$file _name\" && java

Mac view commands for C + + and various environments

macbook-air:$ which g++/usr/bin/g++macbook-air:$ ArchI386macbook-air:$ g++--versionConfigured with:--prefix=/library/developer/commandlinetools/usr--with-gxx-include-dir=/usr/include/c++/4.2.1Apple LLVM version 7.3.0

C language implementation of Word frequency statistics

Demand:1. Design a word frequency statistic software to count the frequencies of words given in English articles.2. The punctuation included in the article does not count toward statistics.3. Output the statistical results in a sort order from large

C + + knows the existence of a virtual function table

Today, look at Chenhao Big blog, directly find about C + + East, see the virtual function table of the content, find some can understand the place to write down notes.0 IntroA virtual function table exists in a class with a virtual function, and in

C # Forms WinForm processes, threads

First, the processA process is a run-time activity of a program with independent functionality about a data collection.It can apply and own system resources, is a dynamic concept, is an active entity.Process class , which is used to manipulate

Why it is dangerous to use the gets function in the C language

If you have the code like this:char s[10];gets( s );And you type in more than ten characters when the program is run, you'll overflow the buffer, causing undefined behaviour . The gets () function has a means of preventing you typing the characters

C # functions

Other function knowledge points are basically the same, C # features:1.ref keywordsParameters are passed by value to pass by reference, function parameter variables handle changes in the function, change function parameter values, no return  static

C # Serialization and deserialization of JSON objects general class Jsonhelper

Today's program-bound JSON is a great way to go. Because the JSON object has the advantage of short and efficient, widely popular C # code farming. This is a common class library for serializing and deserializing JSON objects, which I hope will be

[C #] System.Timers.Timer

SummaryThere are several timers in. NET, Most like to use the timer under the System.Timers namespace, it is relatively simple to use, as a scheduled task, there are quartz.net, but sometimes, a very simple task, do not want to introduce the timing

C #, Simple mail-sending, mail-assisted classes

This help class can only send simple basic mail, can only be sent to multiple users, single content. Does not have the CC feature, attachments add functionality. The function code is as follows Private voidButton3_Click (Objectsender,

C # upload files with native JS

1. This article is using native JS to upload files, there are two versions, one without Ajax, one with Ajax. 1) Non-Ajax DOCTYPE HTML>HTML>Head> Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8"/> title>title> MetaCharSet=

C # Restarts the IIS specified Web site and the specified application pool

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingSystem.Text;5 usingSystem.Threading;6 usingSystem.IO;7 usingMicrosoft.Web.Administration;8 9 Ten namespaceRecoverywebsite One { A class Program - { - Const

The C # enumeration description gets

public static Class Enumextension{public static string GetDescription (this Enum value){FieldInfo field = value. GetType (). GetField (value. ToString ());DescriptionAttribute attribute = attribute.getcustomattribute (field, typeof

C-Joseph Ring

Joseph RingJoseph Ring operation as follows: 1, a group of people sitting together into a ring (such as: number N) 2, starting from a number (such as: K default 1) 3, count to a certain number (such as: M), the person out, the next person re-counted

C and Pointer 12th chapter structure integral assignment error:expected expression

An error occurred while defining the overall assignment of the struct bodytypedef struct Node {struct node *fwd;struct node *bwd;int value;} node;//Declaration variable Node First;first = {NULL, &second, 4};Error: error:expected expressionThe

Activex control programming in Qt environment ------- 1, activex ------- 1

Activex control programming in Qt environment ------- 1, activex ------- 1 I first came into contact with this activeX control. After referring to a lot of tutorials on the internet, I finally took more than three hours to get a preliminary

LZO usage and introduction

LZO usage and introductionLZO description Summary LZO is a lossless compression library written in ansi c. He can provide very fast compression and decompression functions. Decompression does not require memory support. Even if a large compression

Lower_bound and upper_bound algorithms, upper_bound

Lower_bound and upper_bound algorithms, upper_bound Every Algorithm in STL is very subtle. In the next few days, I want to concentrate on the algorithm in STL. The ForwardIter lower_bound (ForwardIter first, ForwardIter last, const _ Tp & val)

C ++ idlcpp tutorial Python (9), idlcpppython

C ++ idlcpp tutorial Python (9), idlcpppython Last article in this C ++ mixed programming idlcpp tutorial Python article (8) Article 1 idlcpp tutorial in C ++ hybrid programming (I)   Compared with the previous project, except the four files

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