variable-length array是C99添加的一个特性,即数组的长度可以在运行时(run time)决定,而不是在编译时(compile time)。即,定义数组时不一定要使用 const int, 也可以使用变量、函数返回值等。 例如 1intmain(){2inta=5, b=6;3intarr1[a];4intarr2[ min(a,b) ];5intarr3[ rand()%10];67} 这些定...
现在假定了如下的数组: 1intarray1[5][4];2intarray2[100][4];3intarray3[2][4]; 可以使用下面的函数调用: 1tot = sum2d(array1,5);2tot = sum2d(array2,100);3tot = sum2d(array3,2); 这是因为行数可以传递给参量rows,而rows是一个变量。但是如果要处理6行5列的数组,则需要创建另一个函数。
Variable-Length ArrayDescriptionCounted arrays allow variable-length arrays to be encoded as homogeneous elements: the element count n (an unsigned integer) is followed by each array element, starting with element 0 and progressing through element n-1. Declaration...
变长数组(Variable Length Array,VLA)是 C99 标准引入的一个特性,它允许在运行时动态地指定数组的长度。 与传统的静态数组不同,静态数组在定义时必须使用常量表达式来指定长度,而变长数组的长度可以是变量。 变长数组的语法类似于传统数组,只是在方括号中可以使用变量作为长度。例如: c int size = 5; int arr[...
DECLARE TYPE varray_type IS VARRAY(10) OF INT; -- Declare the local type of the variable-length array. v varray_type; -- Create a variable but do not initialize it. The status is NULL. v varray_type := varray_type(); -- Create a variable. The initial value is an empty value. ...
问编译re::engine::RE2时出现"error: variable length array of non-POD element type“EN谷歌搜索...
Variable Length Array for C vla_handle_t : A handle of VLA object , it can be passed into C functions or be saved in the C structs. // Create a VLA object with name and type on C stack. vla_stack_handle(handle_name, type); // Create a VLA object with type in Lua memory. (...
网络变长数组 网络释义 1. 变长数组 最后,你能在C99中使用变长数组(variable-length array)。所有这些技巧也能被扩展到三或更多维数组.这里是第一个技巧 … blog.sina.com.cn|基于3个网页 释义: 全部,变长数组
Variable-length array declarations have no explicit syntax in C, so XDR invents its own syntax using angle brackets. The maximum size is specified between the angle brackets. A specific size can be omitted to indicate that the array may be of any size. variable-array-declaration: type-ident...
A variable length array, which is a C99 feature, is an array of automatic storage duration whose length is determined at runtime. Variable length array declarator syntax array_identifier[ expressiontype-qualifiers* ] If the size of the array is indicated by * instead of an expression, the ...