How do you represent strings in the C language?

In C language, strings can be represented using character arrays. These arrays store a series of characters in contiguous memory space.

For example, to display the string “Hello!”, you can define a character array and initialize it with the corresponding character sequence:

char str[] = "Hello!";

The above code will automatically create a character array ‘str’ and copy the character sequence “Hello!” into it. It is important to note that the size of the character array will be automatically determined based on the length of the initialized character sequence.

Another way is to assign characters one by one to a character array.

char str[7];  // 字符数组的大小需要考虑字符串的长度以及结尾的空字符'\0'
str[0] = 'H';
str[1] = 'e';
str[2] = 'l';
str[3] = 'l';
str[4] = 'o';
str[5] = '!';
str[6] = '\0';  // 字符数组的最后一个字符是空字符'\0'，表示字符串的结束

It is important to note that the last character of a character array must be the null character ‘\0’ to indicate the end of the string.

Furthermore, C language also offers various string processing functions such as strlen() for obtaining the length of a string, strcpy() for copying strings, and strcat() for concatenating strings. These functions make it convenient to manipulate strings.