Programmer Think

catalogue I strlen - string length 1. Function introduction 2. Simulation Implementation II strcpy - string copy 1. Function introduction 2. Simulation Implementation 3. strncpy  III strcat - string append 1. Function introduction 2. Simulation Implementation  3.strncat IV strcmp - string comparison 1. Function introduction 2. Sim ...

Write a C to call Lua's Demo to compile and run add.c content //How many files do you need to include #include <stdio.h> #include "lua.h" #include "lualib.h" #include "lauxlib.h" lua_State* L; int luaadd(int x, int y) { int sum; /*Function name*/ lua_getglobal(L,"add"); /*Parameter stack*/ lua_pushnumber(L, x); /*Parameter ...

1. Pointer array and array pointer concept (1) Pointer array: it is an array of pointers, and the elements in the array are arrays. (2) Array pointer: it is a pointer to an array, a pointer to an array. 2. Expression (1)int *p[5] // Pointer array, combined with square brackets of p, is an array, so it is a pointer array // This array has fi ...

Write before: It's time for the c language class, which has been watered for more than a week, to come to an end --Here's Friday's "C language course design completion quality test", a salute to the sky 1. display of main menu Small management systems generally display the main menu first. Now please design a simple main m ...

The classical "poor cow" problem is described in C language subject Problem description Farmer John has n (n ≤ 10000) cows. However, because they produced too little milk, the farmer was very dissatisfied with them and decided to make the least milk into beef jerky every day. But still a little reluctant, John plans to be mercif ...

C language learning has come to an end. This paper is a summary of the recent learning of C language. Most of the questions come from niuke.com. Topic 1: integer conversion Title Description: write A function to determine how many bits need to be changed to convert integer A to integer B. Idea: in fact, this problem is actually to find how m ...

1. Creation and initialization of one-dimensional array   1.1 creation of array type_t arr_name [const_n]; //type_t is the element type of the index group //const_n is a constant expression that specifies the size of the array //Code 1 int arr1[10]; //Code 2 int count = 10; int arr2[count];//Try to avoid the array length as variable (vari ...

IO: refers to the flow of data transfer between devices Classification by flow direction: Input stream Output stream Classification by data type: Byte stream A: Byte input stream FileInputStream: FileInputStream fis = new FileInputStream("file name of read data"); Byte buffered input stream: BufferedInputStream Bufferedinput ...

review Conditional operator Expression 1? Expression 2: expression 3 Expression 1 is true and the result is the result of expression 2; Otherwise, it is the result of expression 3. sizeof() operator The memory length of calculation types and variables, in bytes int 4 char 1 float 4 short 2 double 8 ++Self increasing -- self decreasin ...

review Use of vim editor: vi file name vi test. c . C language source file Key i: enter the input mode and insert appears in the lower left corner esc key: exit the input mode. The insert in the lower left corner is gone : wq save and exit vi editor :q! Force exit without saving :wq! Force save exit #include <stdio.h> //#Prepr ...