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I hope you all are fine and safe inside your homes. This is a weird time ongoing in the whole world and I hope it will get over soon. As during this time, everyone is locked into their homes. I want to share the C programming language with you. I hope you guys like it, so let's happen today's topic.
In-Built Functions for different header files
List of functions in Math.h file:
Math.h header file supports all mathematical functions. All functions used for Math.h header file are here:
| Function | Description |
|---|---|
| floor() | It returns nearest integer which is less than or equal to argument passed. |
| round() | It returns nearest integer value to float/double/long function. |
| ceil ( ) | This function returns nearest integer value which is greater than or equal to the argument passed to this function. |
| sin ( ) | This function is used to calculate sine value. |
| cos ( ) | This function is used to calculate cosine. |
| cosh ( ) | This function is used to calculate hyperbolic cosine. |
| exp ( ) | This function is used to calculate the exponential “e” to the xth power. |
| tan ( ) | This function is used to calculate tangent. |
| tanh ( ) | This function is used to calculate hyperbolic tangent. |
| sinh ( ) | This function is used to calculate hyperbolic sine. |
| log ( ) | This function is used to calculates natural logarithm. |
| log10 ( ) | This function is used to calculates base 10 logarithm. |
| sqrt ( ) | This function is used to find square root of the argument passed to this function. |
| pow ( ) | This is used to find the power of the given number. |
| trunc.(.) | This function truncates the decimal value from floating point value and returns integer value. |
List of functions in String.h file:
String.h header file contains inbuilt functions mentioned below:
| String Function | Description |
|---|---|
| strcat ( ) | Concatenates string2 at the end of string1 |
| strncat ( ) | Appends a portion of string to another |
| strcpy ( ) | Copies string2 into string1 |
| strncpy ( ) | Copies given number of characters of one string to another |
| strlen ( ) | It gives the length of string1 |
| strcmp ( ) | Returns 0 if string1 is same as string2. |
| strchr ( ) | Returns pointer to first occurrence of char in string1 |
| strrchr ( ) | It shows last occurrence of given character in a string |
| strstr ( ) | It returns pointer to first occurrence of string2 in string1 |
| strrstr ( ) | It returns pointer to last occurrence of string2 in string1 |
| strdup ( ) | It duplicates the string |
| strlwr ( ) | It converts string to lowercase |
| strupr ( ) | It converts string to uppercase |
| strrev ( ) | It reverses the given string |
| strset ( ) | Sets all character in a string to given character |
| strnset ( ) | It sets the portion of characters in a string to given character |
| strtok ( ) | It Tokenizes given string using delimiter |
| memset() | It is used to initialize a specified number of bytes to null or any other value in the buffer |
| memcpy() | It is used to copy a specified number of bytes from one memory to another |
| memmove() | It is used to copy a specified number of bytes from one memory to another or to overlap on same memory. |
| memcmp() | It is used to compare specified number of characters from two buffers |
| memicmp() | It is used to compare specified number of characters from two buffers regardless of the case of the characters |
| memchr() | It is used to locate the first occurrence of the character in the specified string |
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