NSString *string1 = @"hello"; NSString *string2 = [string1 mutableCopy]; NSString *string3 = [string1 copy]; //NSLog(string2); //NSLog(string3); //比较指针 if (string1 == string2) { NSLog(@"指针相同"); } else { NSLog(@"string1通过深拷贝给string2所以指针不同"); } //比...
在使用诸如NSLog, [NSString stringWithFormat:]之类的函数时,都是基于c/c++风格的字符串格式化工作的. Table 1 Format specifiers supported by the NSString formatting methods and CFString formatting functions 平台依赖 Mac OS X uses several data types—NSInteger, NSUInteger,CGFloat, and CFIndex—to provide...
1、formelf.exe介绍 fromelf.exe即keil下的一个处理elf文件的工具,elf文件英文名为Executable and Linking Format ,该文件包括符号表,调试信息,汇编等等,所以通过使用fromelf.exe可以输出较多信息文件,比如hex、bin、asm等。 对于此工具详细的说明文件可以参考:using_the_fromelf_utility.pdf 该文档网上很容易搜索到,这...
puts("Enter a string, please."); fgets(words, STLEN, stdin); printf("Your string twice (puts(), then fputs()):\n"); puts(words); fputs(words, stdout); puts("Enter another string, please."); fgets(words, STLEN, stdin); printf("Your string twice (puts(), then fputs()):\n"...
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step() — Pattern match with regular expression strcasecmp() — Case-insensitive string comparison strcat() — Concatenate strings strchr() — Search for character strcmp() — Compare strings strcoll() — Compare strings strcpy() — Copy string strcspn() — Compare strings strdup() ...
Format)) return -1 } fmt.Printf("video_frame n:%d coded_n:%d\n", video_frame_count, frame.CodedPictureNumber) video_frame_count++ /* copy decoded frame to destination buffer: * this is required since rawvideo expects non aligned data */ libavutil.AvImageCopy(&video_dst_data, &video_...
“终止”按钮 "terminal.integrated.tabs.showActiveTerminal": "always", // 始终显示活动终端 // "terminal.integrated.enableBell": true, // 集成终端启用视觉化铃声 "terminal.integrated.gpuAcceleration": "on", // 集成终端使用GPU加速 "terminal.integrated.rightClickBehavior": "copyPaste", // 集成...
Return a copy of the string converted to lowercase. 可以看到,lower() 函数用来将字符串中的字母转换为小写形式,并返回一个新的字符串。 注意,使用 help() 查看某个函数的用法时,函数名后边不能带括号,例如将上面的命令写作help(str.lower())就是错误的。
B、copy C、format D、Fdisk 相关知识点: 试题来源: 解析 C、format 结果一 题目 DOS系统中的格式化命令是( ) A. dir B. copy C. format D. Fdisk 答案 C相关推荐 1DOS系统中的格式化命令是( ) A. dir B. copy C. format D. Fdisk 反馈...