echo "Hello, World. bla bla bla" | program <arg>char instring[40];
fscanf(stdin,"%s",instring):A string in C is a sequence of characters stored in consecutive memory locations, with a null character (\0) marking the end of the string. A pointer, on the other hand, is a variable that stores the memory address of another variable or data type. In C, strings are often represented as arrays of characters, with the array name acting as a pointer to the first character in the string.
A string can be declared and initialized in C using the char keyword and enclosing the characters within double quotes. For example: char str[] = "Hello World"; This creates an array of characters with the name "str" and initializes it with the string "Hello World".
In C, strings are typically treated as constant arrays and cannot be modified directly. However, by using pointers, it is possible to change the value of a string. For example, you can use the strcpy() function to copy a new string into the memory location of an existing string.
The strlen() function can be used to find the length of a string in C. It takes a string as an argument and returns the number of characters in the string, not including the null character at the end.
In C, a character array is a collection of characters stored in consecutive memory locations, while a string is a character array that is terminated by a null character (\0). This null character indicates the end of the string and allows C to determine the length of the string. Additionally, character arrays can store any type of character, while strings are typically used to store printable characters only.