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                ### 數組一次性賦值 如果賦值時括號中一次性為數組前面的元素賦值,如果數組的長度超過元素的個數,后面的值全部初始化為0. ~~~ int nums[10] = {1, 2, 3}; int len = sizeof(nums) / sizeof(int); for (int i = 0; i < len; ++i) { printf("%d\n", nums[i]); } ~~~ ``` 1 2 3 0 0 0 0 0 0 0 ``` ### 不指定長度賦值 ~~~ int nums[] = {1, 2, 3}; int len = sizeof(nums) / sizeof(int); for (int i = 0; i < len; ++i) { printf("%d\n", nums[i]); } ~~~ ``` 1 2 3 ``` ### 索引越界 ~~~ int nums[] = {1, 2, 3}; //3個元素 for (int i = 0; i < 10; ++i) { //循環10次 printf("%d\n", nums[i]); } ~~~ 從索引為4開始輸出的都是垃圾數 ``` 1 2 3 -1105461172 -1731849365 -492098920 32766 1863881685 32767 1863881685 ```
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