Without the ellipsis notation, the behavior of a function is undefined if it receives parameters in addition to those declared in the parameter list.To call a function with a variable number of arguments, simply
9 ps=(struct stu*)malloc(sizeof(struct stu)); 10 ps->num = 102; 11 ps->name = "Zhang ping"; 12 ps->sex = 'M'; 13 ps->score = 62.5; 14 #ifdef NUM 15 printf("Number=%d\nScore=%f\n", ps->num, ps->score); /*--Execute--*/ 16 #else 17 printf("Name=%s\nSex=%c...
Only going to use first argument. Using both arguments: a=17, b =5 actually fcnt is defined in the header file using int fcntl (int fd, int cmd, ...); This means it can take variable number of arguments. now it looks at the command and then decides if anything follows as the thi...
《Macros with a Variable Number of Arguments.》 1:https://stackoverflow.com/questions/2124339/c-preprocessor-va-args-number-of-arguments 2:https://gcc.gnu.org/onlinedocs/gcc-5.2.0/gcc/Variadic-Macros.html#Variadic-Macros 本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。 原始发表:2018...
functions called with variable number of arguments 4.6 lint Reference and ExamplesThis section provides reference information on lint, including checks performed by lint, lint libraries, and lint filters. 4.6.1 Diagnostics Performed by lintlint
最后,在函数结束时使用 va_end() 宏结束可变参数列表的访问。 当上面的代码被编译和执行时,它会产生下列结果。应该指出的是,函数average()被调用两次,每次第一个参数都是表示被传的可变参数的总数。省略号被用来传递可变数量的参数。 Averageof2,3,4,5=3.500000Averageof5,10,15=10.000000...
text global main main: push rbp mov rbp,rsp mov r12, rdi ;rdi contains number of arguments mov r13, rsi ;rsi contains the address to the array of arguments printArguments: mov rdi, msg call printString mov rbx, 0 printLoop: mov rdi, qword [r13+rbx*8] call printString mov rdi, NL...
int NumArgs - this is the number of parameters. Normally this will already have been checked and will be exactly what you've defined in your function prototype. It is however possible to define functions with variable numbers of arguments using a stdarg-like "..." method and this is where...
). This construction, called the "ellipsis notation," indicates a variable number of arguments to the function. (See Calls with a Variable Number of Arguments for more information.) However, a call to the function must have at least as many arguments as there are parameters before the last ...
In this case, the compiler checks as many arguments as there are type names in the list of parameters and converts them, if necessary, as described above. See Calls with a Variable Number of Arguments for more information. If the prototype's parameter list contains only the keyword void, ...