C-style strings and the string.h functions, multidimensional arrays, structs, unions, enums, typedef and bit fields.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a C-style string?
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A null-terminated character array, where the last character is the null terminator '\0'.- What does strlen() do?
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Returns the number of characters in a string, not including the null terminator.- What does strcpy() do?
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Copies one string to another, including the null terminator.- Why is strcpy() considered dangerous?
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It does not check buffer size and can cause buffer overflow if the source is too large.- What is the safer alternative to strcpy()?
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strncpy(), which takes a maximum number of characters to copy.- What does strcat() do?
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Concatenates (appends) one string to the end of another.- What does strcmp() return?
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Returns 0 if strings are equal, negative if first is less, positive if greater.- What does strchr() find?
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Locates the first occurrence of a character in a string and returns a pointer to it.- What does strstr() find?
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Locates the first occurrence of a substring within a string and returns a pointer to it.- What does strtok() do?
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Splits a string into tokens (substrings) based on delimiter characters.- What header file contains string functions?
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string.h (or cstring in C++)- How do you declare a character array to hold a 50-character string?
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char str[51]; (the +1 accounts for the null terminator)- What is the difference between a string literal and a character array?
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A string literal is constant and read-only; a character array is mutable storage that can be modified.- How do you initialize a string with a value?
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char str[] = "hello"; or char str[6] = "hello";- What is a multidimensional array?
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An array of arrays, such as a 2D array that represents rows and columns.
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