Array of pointers: 月份与数字对应 && Array of arrays

 Array of arrays:

#include <stdio.h>
#include <string.h>
int main()
{
    char tracks[][100] = {
        "will the protesters in American cities bring progress",
        " or set back ",
        "the cause they champion?",
    };

    for (int i = 0; i < 3; ++i)
    {
        strcpy(tracks[i], "there are plenty of good reasons for a young person to choose to go to university.");
        //修改track内容
    }

    for (int i = 0; i < 3; ++i)
    {
        printf("%s
", tracks[i]);
    }
    return 0;
}

Array of pointers:

#include <stdio.h>
int main()
{
    //月份与数字对应, 比如:输入4，输出apr; 输入8, 输出aug...
    //定义二维字符数组，每一个方括号用来确定行，第二个用来确定列。
    //为什么第二个方括号数字是5，如果是4行不行？不行，因为“sept”已经占4个字符，字符串常量结尾需要0占一位，所有是5; 如果这里sept换成sep，则可以是months[][4];
    char months[][5] = {"jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sept", "oct", "nov", "dec"};
    puts("input your number: ");
    int i;
    scanf("%d", &i);
    printf("%s
", months[i-1]); //数组从0开始计数，输入数字3，需要对应数组元素2
    return 0;
}