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15.数组遍历
#include <stdio.h> int main() { int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
int i; for(i=0;i<10;i++) { printf("%d\n",arr[i]); } return 0; }
* 数组的冒泡排序
冒泡排序的思想：相邻元素两两比较，将较大的数字放在后面，直到将所有数字全部排序。
* 字符串与数组
在C语言中,是没有办法直接定义子字符串数据类型的,需使用数组来定义所要的字符串,形式如下:
* char 字符串名称[长度] = "字符串内容";
* char 字符串名称[长度] = {'字符串1','字符串2',....,'字符串n','\0'};
注:
* []中的长度可以省略不写;
* 采用第二种方式最后一个元素必须是'\0',表示结束;
* 第二种方式不能写中文!; 输出字符串时,要使用:printf("%s",字符数组名);或puts(字符数组名);
16.字符串函数
* strlen(s):获取字符串s的长度;
*
strcmp(s1,s2):比较字符串;比较的时候会把字符串转换成ASCII码再进行比较,返回结果为0表示s1和s2的ASCII码值相等,返回结果为1表示s1比s2的ASCII码大,返回结果为-1表示s1比s2的ACSII码小;
* strcpy(s1,s2):字符串拷贝;s2会取代s1中的内容;
* strcat(s1,s2)将s2拼接到s1后面;注意:s1的length要足够才可以!
* atoi(s1)将字符串转为整数!
17.多维数组
数据类型 数组名称[常量表达式1]...[常量表达式n];
多维数组的初始化与一维数组的初始化类似也是分两种：
* 数据类型 数组名称[常量表达式1][常量表达式2]...[常量表达式n] = {
{值1,..,值n},{值1,..,值n},...,{值1,..,值n}};
* 数据类型 数组名称[常量表达式1][常量表达式2]...[常量表达式n]; 数组名称[下标1][下标2]...[下标n] = 值;
多维数组初始化要注意以下事项：
* 采用第一种始化时数组声明必须指定列的维数。因为系统会根据数组中元素的总个数来分配空间，当知道元素总个数以及列的维数后，会直接计算出行的维数；
* 采用第二种初始化时数组声明必须同时指定行和列的维数。
18.多维度数组的遍历
使用嵌套循环
注意:多维数组的每一维下标均不能越界!
