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string.h)

The `#include ` directive includes the string manipulation header file in your C program. The `string.h` header provides functions for manipulating strings and working with character arrays. Here are some commonly used functions provided by `string.h`: 1. String Manipulation: - `strcpy()`: Copies a string from source to destination. - `strcat()`: Concatenates (appends) one string to another. - `strlen()`: Calculates the length of a string. - `strcmp()`: Compares two strings lexicographically. - `strchr()`: Finds the first occurrence of a character in a string. - `strstr()`: Finds the first occurrence of a substring in a string. 2. Memory Operations: - `memset()`: Sets a block of memory with a particular value. - `memcpy()`: Copies a block of memory from source to destination. 3. String Conversion: - `atoi()`: Converts a string to an integer. - `atof()`: Converts a string to a floating-point number. 4. Tokenization: - `strtok()`: Breaks a string int...
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stdlib.h

The `#include ` directive includes the standard library header file in your C program. The `stdlib.h` header provides functions, macros, and types for various general-purpose tasks in C. Here are some commonly used functions provided by `stdlib.h`: 1. Memory Management: - `malloc()`: Allocates a block of memory. - `calloc()`: Allocates and initializes a block of memory. - `realloc()`: Changes the size of a previously allocated block of memory. - `free()`: Deallocates a block of memory. 2. String Conversion and Pseudo-Random Numbers: - `atoi()`: Converts a string to an integer. - `atof()`: Converts a string to a floating-point number. - `rand()`: Generates a pseudo-random integer. - `srand()`: Seeds the random number generator. 3. Process and Environment Control: - `system()`: Executes a shell command. - `exit()`: Terminates the program execution. - `getenv()`: Retrieves the value of an environment variable. 4. Sorting and Searching: - `qsort()`:...
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All function names in c

Here are the names of the standard headers in C: 1. ` ` 2. ` ` 3. ` ` 4. ` ` 5. ` ` 6. ` ` 7. ` ` 8. ` ` 9. ` ` 10. ` ` 11. ` ` 12. ` ` 13. ` ` 14. ` ` 15. ` ` 16. ` ` 17. ` ` These headers provide various functions, macros, and types that cover a wide range of programming tasks in the C language.
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stdio.h

The `#include ` directive includes the standard input/output (I/O) header file in your C program. The `stdio.h` header provides functions, macros, and types for input and output operations. Here are some of the commonly used functions provided by `stdio.h`: 1. Input Functions: - `scanf()`: Reads formatted input from the standard input (keyboard) or a specified stream. - `fscanf()`: Reads formatted input from a specified stream. - `getchar()`: Reads a single character from the standard input (keyboard). - `fgets()`: Reads a line of text from a specified stream. 2. Output Functions: - `printf()`: Writes formatted output to the standard output (console) or a specified stream. - `fprintf()`: Writes formatted output to a specified stream. - `putchar()`: Writes a single character to the standard output (console). - `puts()`: Writes a string followed by a newline character to the standard output (console). 3. File Operations: - `fopen()`: Opens a file and return...
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