C12---Array

////main.c//Basic concepts of arrays////Created by Xiaomage on 15/6/9.//Copyright (c) 2015 Itcast. All rights reserved.//#include<stdio.h>intMainintargcConst Char*argv[]) {            //arrays are used when you need to keep a lot of "same type" data//because if you use variables, it becomes very complex and very technical.    intScore = About; intScore1 =98; ...    intscore998 = the; printf ("%i\n", score); /*Array definition Format: Data type variable name;     Data type array name [number of data];     Element type array name [number of elements]; Element type: Is the data type that needs to be stored in the array, and once specified, the array can only store the number of data elements of that type: the number of data (elements) that can be stored in the array*/    intnum; Num= A; printf ("num =%i\n", num); intscores[3];//defines an array of names called scores, which can hold 3 data of type int//scores = n;//The system can't figure out who to assign to .//as long as a C-language array is defined, the system automatically assigns a number to each piece of storage space in the array.//This number starts at 0 and increments once.//The number that the system automatically binds in the array, which we call an indexscores[0] = A; scores[1] = the; scores[2] = -; printf ("Scores[0] =%i\n", scores[0]); return 0;}

////main.c//initialization and traversal of arrays////Created by Xiaomage on 15/6/9.//Copyright (c) 2015 Itcast. All rights reserved.//#include<stdio.h>intMainintargcConst Char*argv[]) {    //need to keep 101 people in the class//element type array name [number of elements];    /*//define re-initialize int scores[5];    Scores[0] = 99;    SCORES[1] = 88;    SCORES[2] = 77;    SCORES[3] = 66;     SCORES[4] = 100; */    /*int num;        num = 10;     int NUM1 = 10; */    //assigns each value in the {} to each element in the array in turn//and assign values starting from 0//also known as the initialization of arrays (fully initialized)    intscores[5] = { About, the, the, the, -}; //Partial Initialization//Initialize starting from 0, assigning values in turn//Note: If "in partial initialization" the corresponding memory is not initialized, then the default is 0    intscores1[3] = { One, A}; printf ("0 =%i\n", scores1[0]); printf ("1 =%i\n", scores1[1]); printf ("2 =%i\n", scores1[2]); printf ("-------\ n"); //Note: If there are no arrays initialized (full and departmental), then do not use the data in the array, possibly a piece of junk data (random value)    intscores2[3]; printf ("0 =%i\n", scores2[0]); printf ("1 =%i\n", scores2[1]); printf ("2 =%i\n", scores2[2]); printf ("-------\ n"); //Note: When defining an array, the number of elements in the array cannot be used, and if a variable is used, then there are some random values in the array.    intnum =Ten; intScores3[num]; printf ("0 =%i\n", scores3[0]); printf ("1 =%i\n", scores3[1]); printf ("2 =%i\n", scores3[2]); //Note: It is not recommended to use a variable to define an array, if the variable is used to define an array, as the number of elements of the array, the uninitialized case is a random value, if the initialization will directly error//int num2 = ten;//int scores4[num2] = {one, one};printf"-------\ n"); //Note: If the definition is initialized at the same time, then the number of elements can be omitted//after omitting, the initialization of the assignment of several data, then the length of the array is a few. That is, the array will store several data in the future.    intScores5[] = {1,3}; printf ("0 =%i\n", scores5[0]); printf ("1 =%i\n", scores5[1]); printf ("-------\ n"); //Note: If an array is defined without initialization, the number of elements cannot be omitted//int scores6[]; //0 1 2) 3 4//int socres7[101] = {0, 0, 0, 1, 3};//int socres7[101];//socres7[99] = 1;//socres7[100] = 3; //You can assign a value to an element of the specified index by means of [indexed] =    intsocres7[101] = {[ About] =1, [ -] =3}; printf ("3 =%i\n", socres7[ About]); printf ("4 =%i\n", socres7[ -]); //Note: The {} can only be initialized at the same time as defined, and cannot be initialized with {} If it is defined first//If you define it first, you can no longer assign a whole value//int scores8[3];//Scores8 = {1, 4, +};//scores8[0] = 1;        return 0;}

////main.c//traversal of an array////Created by Xiaomage on 15/6/9.//Copyright (c) 2015 Itcast. All rights reserved.//#include<stdio.h>intMainintargcConst Char*argv[]) {    //Take out all the values in the array, called Traversal    intscores[6] = {1, at, -, the, in, the, About,2}; /*printf ("scores[0] =%i\n", scores[0]);    printf ("scores[1] =%i\n", scores[1]);    printf ("scores[2] =%i\n", scores[2]);    printf ("scores[3] =%i\n", scores[3]);    printf ("scores[4] =%i\n", scores[4]);     printf ("scores[5] =%i\n", scores[5]); */    //Note: When iterating through an array, try not to write the number of times//how many times to traverse should be determined by the array, that is, how many times the traversal should be computed by the array    /*printf ("scores =%lu\n", sizeof (scores));//Calculates the total number of bytes occupied by the array printf ("scores[0] =%lu\n", sizeof (Scores[0]));//Calculation    The number of bytes occupied by an element in the array printf ("A number of elements:%lu\n", sizeof (scores)/sizeof (scores[0)); */    //dynamically computes the number of elements in an array    intLength =sizeof(scores)/sizeof(scores[0]);  for(inti =0; i < length; i++) {printf ("scores[%i] =%i\n", I,scores[i]); }    return 0;}

C12---Array