pointer_variable 是需要转换的指针变量。 常见场景 通用指针 (void *) 的转换: void * 是一种通用指针类型,可以指向任何数据类型。 在需要时,可以将 void * 转换为具体的指针类型。 示例: c #include <stdio.h> void printInt(void *ptr) { printf("Value: %d\n", *(int *)ptr); // 将 void* ...
// crt_printf.c// This program uses the printf and wprintf functions// to produce formatted output.#include<stdio.h>intmain(void){charch ='h', *string="computer";wchar_twch = L'w', *wstring =L"Unicode";intcount =-9234;doublefp =251.7366;// Display integersprintf("Integer formats:...
wstring, wstring); wprintf(L"Strings in field (2):\n%25S\n" L"%25.4hs\n %s%25.3ls\n", string, string, wstring, wstring); // Display real numbers printf("Real numbers:\n %f %.2f %e %E\n", fp, fp, fp, fp ); // Display pointer printf( "\nAddress as: %p\n", &count)...
void_putchar(charcharacter) {// send char to console etc.} Usage is 1:1 like the according stdio.h library version: intprintf(constchar*format, ...);intsprintf(char*buffer,constchar*format, ...);intsnprintf(char*buffer,size_tcount,constchar*format, ...);intvsnprintf(char*buffer,size...
1,格式控制符“%p”中的p是pointer(指针)的缩写。指针的值是语言实现(编译程序)相关的,但几乎所有实现中,指针的值都是一个表示地址空间中某个存储器单元的整数。printf函数族中对于%p一般以十六进制整数方式输出指针的值,附加前缀0x。 2,这里的"c=%#x\n"意思是:是一个格式控制符,其中c=是普通字符,%#x是...
Display real numbers printf("Real numbers:\n %f %.2f %e %E\n", fp, fp, fp, fp ); // Display pointer printf( "\nAddress as: %p\n", &count); } Sample Output Kopéieren Integer formats: Decimal: -9234 Justified: -009234 Unsigned: 4294958062 Decimal -9234 as: Hex: FFFFDBEEh C ...
6、printf()...中的’\r’表示把cursor移动到本行首,‘\n’表示移动到下一行(并没有包含移动到行首的意思),但在C语言中’\r’被识别成ctrl+M,’\n’被解释成移动到行首再换行。...8、printf()、%p输出地址 int* p; p=(int*)malloc(1234); printf("pointer=%p\n",p); free(p); 说明:以上...
(v_l);//结束一个可变长参数列表20returnmax_var;21}22//可能对va_arg不是很清楚,这里再说明一下23voidsome_arg(intst,...)24{25va_list la;26va_start(la,st);//开始一个可变长参数列表27intarg1 = va_arg(la,int);//取一个int类型的数据28printf("arg1:%d\n",arg1);29chararg2 = va_...
Each of these functions takes a pointer to an argument list, and then formats and writes the given data to the memory pointed to bybuffer. The versions of these functions with the_lsuffix are identical except that they use the locale parameter passed in instead of the current thread locale...
vsprintf accepts a pointer to a series of arguments, applies to each a format specifier contained in the format string pointed to by format, and outputs the formatted data to a string. There must be the same number of format specifiers as arguments. Return Value vsprintf returns the number ...