C

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说明：  1.1 C基础知识 1 1.2 函数与头文件 2 1.3 C预处理器 3 1.4 将一个字符转换为long型 4 1.5 strcpy函数 4 1.6 assert用法 5 1.7 itoa函数和atoi函数 6 1.8 strcmp函数实现 8 1.9 strcpy函数实现 9 1.10 memcpy函数实现 10 1.11 memcpy和memmove函数的实现 11 1.12 strcat函数实现 13 1.13 使用库函数atoi，将char *→int 13 1.14 使用库函数itoa，将int→char * 14 1.15 不使用库函数，将int→char * 14 1.16 不使用库函数，将char *→int 15 1.17 求两个整数的最大公约数 16 1.18 Little_endian or Big_endian 17 1.19 sizeof与strlen的区别 19 1.20 实现String类的BIG_FOUR 19 1.21 struct和union的区别 20 1.22 char字符变量与int整型数据 22 1.23 字,字节,字符,比特 23 1.24 空格、空字符、字符数组结束符的区别 25(1.1 C Basics 1 1.2 Functions and header files 2 1.3 C preprocessor 3 1.4 will be a long-type characters into four 1.5 strcpy function 4 1.6 assert usage 5 1.7 itoa function and atoi function 6 1.8 strcmp function to achieve 8 1.9 strcpy function to achieve 9 1.10 memcpy function to achieve 10 Achieve 11 1.11 memcpy and memmove function 1.12 strcat function to achieve 13 1.13 using the library function atoi, the char* → int 13 1.14 using the library function itoa, the int → char* 14 1.15 does not use the library function, int → char* 14 1.16 does not use the library function, char* → int 15 1.17 find the greatest common divisor of two integers 16 1.18 Little_endian or Big_endian 17 Difference 1.19 sizeof and strlen 19 1.20 realize BIG_FOUR String class 19 Difference 1.21 struct and union of 20 1.22 char and int integer variable character data 22 1.23 word, byte, character, bit 23 Difference 1.24 spaces, null characters, character array termi)