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Destructors in C++ are members functions in a class that delete an object. They are called when the class object goes out of scope such as when the function ends, the program ends, a delete variable is called etc.Destructors are different from normal member functions as they don’t take any argument and don’t return anything. Also, destructors have the same name as their class and their name is preceded by a tilde(~).A program that demonstrates destructors in C++ is given as follows.Example Live Demo#include using namespace std; class Demo { private: int num1, num2; public: Demo(int n1, ... Read More
A sparse matrix is a matrix in which majority of the elements are 0. An example for this is given as follows.The matrix given below contains 5 zeroes. Since the number of zeroes is more than half the elements of the matrix, it is a sparse matrix.5 0 0 3 0 1 0 0 9A program to implement a sparse matrix is as follows.Example Live Demo#include using namespace std; int main () { int a[10][10] = { {0, 0, 9} , {5, 0, 8} , {7, 0, 0} }; int i, j, count = 0; int row = 3, col = 3; for (i = 0; i < row; ++i) { for (j = 0; j < col; ++j){ if (a[i][j] == 0) count++; } } cout
To change the pagination size, use the font-size property. You can try to run the following code to increase the size of pagination:ExampleLive Demo .demo { display: inline-block; } .demo a { color: red; padding: 5px 12px; text-decoration: none; transition: background-color 2s; border: 1px solid orange; font-size: 18px; } .demo a.active { background-color: orange; color: white; border-radius: 5px; } .demo a:hover:not(.active) { background-color: yellow; } .demo a:first-child { border-top-left-radius: 10px; border-bottom-left-radius: 10px; } .demo a:last-child { border-top-right-radius: 10px; border-bottom-right-radius: 10px; } Our Quizzes
The function strspn() is used to calculate the length of substring of first string which is present in second string. It returns the length of that substring.Here is the syntax of strspn() in C language,size_t strspn(const char *string1, const char *string2);Here is an example of strspn() in C language,Example Live Demo#include #include int main() { const char s1[] = "Helloworld!"; const char s2[] = "Hello"; int length = strspn(s1, s2); printf("The length of string : %d", length); return 0; }OutputThe length of string : 5
The function ispunct() is used to check that the passing character is a punctuation or not. It returns zero, if it is not a punctuation, otherwise it returns a non-zero value.Here is the syntax of ispunct() in C language, int ispunct(int character);Here is an example of ispunct() in C language, Example Live Demo#include #include int main() { int a = '!'; int b = 'a'; if(ispunct(a)) printf("The character is a punctuation."); else printf("The character is not a punctuation."); if(ispunct(b)) printf("The character is a punctuation."); else printf("The character is not a ... Read More
The function fflush(stdin) is used to flush the output buffer of the stream. It returns zero, if successful otherwise, returns EOF and feof error indicator is set.Here is the syntax of fflush(stdin) in C language,int fflush(FILE *stream);Here is an example of fflush(stdin) in C language,Example Live Demo#include #include int main() { char s[20] = "Helloworld"; printf("The string : %s", s); fflush(stdin); return 0; }OutputThe string : Helloworld
rand()The function rand() is used to generate the pseudo random number. It returns an integer value and its range is from 0 to rand_max i.e 32767.Here is the syntax of rand() in C language, int rand(void);Here is an example of rand() in C language, Example Live Demo#include #include int main() { printf("%d", rand()); printf("%d", rand()); return 0; }Output1804289383 846930886srand()The function srand() is used to initialize the generated pseudo random number by rand() function. It does not return anything.Here is the syntax of srand() in C language, void srand(unsigned int number);Here is an example of srand() in C ... Read More
The swap() function is used to swap two numbers. By using this function, you do not need any third variable to swap two numbers.Here is the syntax of swap() in C++ language, void swap(int variable_name1, int variable_name2);If we assign the values to variables or pass user-defined values, it will swap the values of variables but the value of variables will remain same at the actual place.Here is an example of swap() in C++ language, Example Live Demo#include using namespace std; int main() { int x = 35, y = 75; printf("Value of x :%d", x); printf("Value of ... Read More
The CHAR_BIT is the number of bits in char. It is declared in “limits.h” header file in C++ language. It is of 8-bits per byte.Here is an example of CHAR_BIT in C++ language,Example Live Demo#include using namespace std; int main() { int x = 28; int a = CHAR_BIT*sizeof(x); stack s; cout
The new operatorThe new operator requests for the memory allocation in heap. If the sufficient memory is available, it initializes the memory to the pointer variable and returns its address.Here is the syntax of new operator in C++ language, pointer_variable = new datatype;Here is the syntax to initialize the memory, pointer_variable = new datatype(value);Here is the syntax to allocate a block of memory, pointer_variable = new datatype[size];Here is an example of new operator in C++ language, Example#include using namespace std; int main () { int *ptr1 = NULL; ptr1 = new int; float *ptr2 = new ... Read More