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The delete operator is used to deallocate the memory. User has privilege to deallocate the created pointer variable by this delete operator.Here is the syntax of delete operator in C++ language,delete pointer_variable;Here is the syntax to delete the block of allocated memory,delete[ ] pointer_variable;Here is an example of delete operator in C++ language,Example Live Demo#include using namespace std; int main () { int *ptr1 = NULL; ptr1 = new int; float *ptr2 = new float(299.121); int *ptr3 = new int[28]; *ptr1 = 28; cout
To display two-digit day number, use the SimpleDateFormat('dd') as shown below −// displaying two-digit day number f = new SimpleDateFormat("dd"); String strDay = f.format(new Date()); System.out.println("Day Number = "+strDay);Since, we have used the Format and SimpleDateFormat class above, therefore import the following packages. With that, we have also used the Date.import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date;The following is an example.Example Live Demoimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Calendar; public class Demo { public static void main(String[] args) throws Exception { // displaying current date and time Calendar cal = Calendar.getInstance(); ... Read More
The function iswpunct() is used to check that the passing wide character is a punctuation or not. It returns zero, if it is not a punctuation, otherwise it returns a non-zero value. It is declared in “cwctype” header file.Here is the syntax of iswpunct()int iswpunct(wint_t character);Here is an example of iswpunct()Example#include #include using namespace std; int main() { wint_t a = '!'; wint_t b = 'a'; if(iswpunct(a)) printf("The character is a punctuation."); else printf("The character is not a punctuation."); if(iswpunct(b)) printf("The character is a punctuation."); else printf("The character is not ... Read More
The function strcspn() counts the number of characters before first match of characters in both strings. This is declared in “string.h” header file. It returns the number of characters of first string before the occurrence of first matched character.Here is the syntax of strcspn() in C language, size_t strcspn(const char *string1, const char *string2)Here, string1 − The first string which is to be scanned.string2 − The second string which is used to search the matching character in first string.Here is an example of strcspn() in C language, Example Live Demo#include #include int main() { char str1[] = "Helloworld!"; char ... Read More
The function islessequalr() is used to check that first argument is less than or equal to the second. It is declared in “math.h” header file. It returns true, if successful otherwise false.Here is the syntax of islessequal()bool islessequal(value1 , value2);Here, value1 − This is the first argument which will be checked with value2.value2 − This is the second argument which is used to check value1 that is less or equal.Here is an example of islessequal()Example Live Demo#include #include using namespace std; int main() { int val1 = 8; int val2 = 8; bool result; result = islessequal(val1, ... Read More
The function strxfrm() transforms the source string to the current locale and copies the first number of characters of transformed string to the destination. It is declared in “locale.h” header file in C language.Here is the syntax of strxfrm() in C language, size_t strxfrm(char *destination, const char *source, size_t number)Here, destination − The destination pointer where the characters will be copied.source − The string is to be transformed.number − The number of characters to be copied.Here is an example of strxfrm() in C language, Example#include #include int main () has { char s[10] = "HelloWorld"; char ... Read More
The datatype size_t is unsigned integral type. It represents the size of any object in bytes and returned by sizeof operator. It is used for array indexing and counting. It can never be negative. The return type of strcspn, strlen functions is size_t.Here is the syntax of size_t in C language, const size_t var_name;Here, var_name − This the name of variable.Here is an example of size_t in C language, Example Live Demo#include #include #include int main(void) { const size_t x = 150; int a[x]; for (size_t i = 0;i < x; ++i) a[i] = ... Read More
The return value of main() function shows how the program exited. The normal exit of program is represented by zero return value. If the code has errors, fault etc., it will be terminated by non-zero value.In C++ language, the main() function can be left without return value. By default, it will return zero.Here is the syntax of main() function in C language, int main() { …. return 0; }Here is an example of main() function in C language, Example Live Demo#include int main() { int a = 10; char b = 'S'; float c = ... Read More
fgets()The function fgets() is used to read the string till the new line character. It checks array bound and it is safe too.Here is the syntax of fgets() in C language, char *fgets(char *string, int value, FILE *stream)Here, string − This is a pointer to the array of char.value − The number of characters to be read.stream − This is a pointer to a file object.Here is an example of fgets() in C language, Example Live Demo#include #define FUNC 8 int main() { char b[FUNC]; fgets(b, FUNC, stdin); printf("The string is: %s", b); return 0; }OutputThe ... Read More
malloc()The function malloc() is used to allocate the requested size of bytes and it returns a pointer to the first byte of allocated memory. It returns null pointer, if fails.Here is the syntax of malloc() in C++ language, pointer_name = (cast-type*) malloc(size);Here, pointer_name − Any name given to the pointer.cast-type − The datatype in which you want to cast the allocated memory by malloc().size − Size of allocated memory in bytes.Here is an example of malloc() in C language, Example Live Demo#include #include int main() { int n = 4, i, *p, s = 0; p = ... Read More