Global Static Variable
C/C++ static vs global statichas a very simple logic to it. If a variable isstatic, it means that it is a global variable, but it's scope is limited to where it is defined (i.e. only visible there). For example: Outside a function: global variable but visible only within the file...
下面是 a.c 的内容: chara ='A';//global variablevoidmsg() { printf("Hello\n"); } 下面是 main.c 的内容: intmain(void) {externchara;//extern variable must be declared before useprintf("%c", a); (void)msg();return0; } 程序的运行结果是: A Hello 如果加了 static,就会对其它源文...
Static vs. Local Variables 下面的这个例子可以看出Static变量和Local变量的区别: static int n; // Static variable – outside ‘module’ – // globally declared //visible to all modules/scopes that follow. module vars; int n; //Local variable - Module level - visible to all scopes below init...
4、谁来调用这个__do_global_ctors_aux数组,同样是gcc-4.1.0\gcc\crtstuff.c文件 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* Stick a call to __do_global_ctors_aux into the .init section. */ CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_ctors_aux) 这个宏将会展开...
首先我看分析下这三个变量在程序中存储的位置,因为 s_int_b 和 s_int_a 是全局和局部静态变量,所以是在 bss 段存储,而 int_a 是一个局部所以是在栈上存储。使用 objdump 可以查看 objdump -t main.o main.o: file format elf64-x86-64 SYMBOL TABLE: 0000000000000000 l df *ABS* 0000000000000000 main...
intx=42;intmain(){// you don't need to capture a global variable[]{returnx;}();} 但如果是局部变量,由于它的存储时期为 automatic,就必须捕获才能使用: intmain(){intx=42;// you have to capture a local variable[&x]{returnx;}();} ...
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Declared a global variable, int glbInt, in myHeader.h. Added this header to stdafx.h. Then initialize this glbInt in the App class and use it in mainframe and view classes. Compile, and get error LNK2005. int GlbInt already defined in MainFrm when linking stdafx.obj. I tried to add...
Performance Across different use cases and regions, average load times for Mapbox’s static images are between 100-425ms, which are some of the fastest load times in the industry. Data Overlays Add GeoJSON, markers, and paths as overlays to your static maps for quick and simple data visuali...