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8.3  String Handling Functions

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While the language itself provides little assistance with handling character strings, the standard STRING FUNCTIONS (contained in TC's ANSI library) give C programmers the capability to manipulate strings easily.  These functions are declared in string.h:

    # include  <string.h>

Strings in C are character arrays terminated with the null character '\0'.  Since the name of an array is a pointer to the beginning of the array, most of the standard string functions accept a character pointer as an argument.  A string constant is a sequence of characters enclosed in double quotes.  The null character is provided automatically and the constant is treated as an array name.  Since C does not provide built-in array copying capability, the strcpy() function is used:

    char   str1[80];
    strcpy(str1,"Hello, world!");

The strcpy() function copies each character of the string pointed to by its second argument to the corresponding element of the string pointed to by its first argument