C++ Articles - Page 680 of 717

Both strncmp() and strcmp() are used in C/C++ programs for lexicographical string comparison. The strcmp() compares two strings till the null character is found, whereas strncmp() only compares a specified number of characters. What is strncmp() ? The function strncmp() is used to compare left string to right string up to a number. It works same as strcmp(). It returns a value greater than zero when the matching character of left string has greater ASCII value than the character of the right string. Returns a value less than zero when the matching character of left string has lesser ASCII value ... Read More

In C++, a single character is represented using a single quotation (' ') while a string is represented using a double quotation (" "). To change the single character into a string, use approaches like string_constructor, push_back(), etc., that solve the conversion. Example Input: ch = 'A' Output: str = A // "A" So, character A is converted to a string. C++ provides various approaches to convert single character into string as follows: Using string constructor Using push_back() Using stringstream ... Read More

The function remquo() is used to calculate the floating point remainder of numerator or denominator and stores the quotient to the passed pointer. It returns Nan(Not a number) when denominator is zero.Here is the syntax of remquo() in C++ language, float remquo(float var1, float var2, int* var3);Here, var1  − The variable which stores the value of numerator.var2  − The variable which stores the value of denominator.var3  − The pointer variable which stores the quotient.Here is an example of remquo() in C++ language, Example Live Demo#include #include using namespace std; int main() {    float x = 28.8; ... Read More

The function ldexp() is used to calculate the multiplication of a floating point value ‘a’ by the number 2 raised to the exponent power. It takes two arguments, first is a floating point number and second is an integer value.Here is the mathematical expression of ldexp(), ldexp() = a * 2^bHere is the syntax of ldexp() in C++ language, float ldexp(float variable1 , int variable2)Here, variable1  − Any name given to the variable which is representing the significand.variable2  − Any name given to the variable which is representing the exponent.Here is an example of ldexp() in C++ language, Example Live Demo#include ... Read More

The function expm1() is used to calculate the exponential raised to the power of any number minus one. It returns the value of (exponential raised to the power of a) - 1.Here is the mathematical expression of expm1(),expm1(a) = (e^a) - 1Here is the syntax of expm1() in C++ language,float expm1(variable_name);Here,variable_name − Any name given to the variable whose value is calculated.Here is an example of expm1() in C++ language,Example Live Demo#include #include using namespace std; int main() {    int x = 10;    float y = 8.28;    cout

The function log1p() is used to calculate the natural logarithm (base e logarithm) of (a+1) where a is any number. It returns the value of natural logarithm of (a+1). It returns Not a number(Nan) when we pass a value which is less than -1.Here is the mathematical expression of log1p(), log1p(a) = base-e log(a+1)Here is the syntax of log1p() in C++ language, float log1p(float variable_name);Here, variable_name  − Any name given to the variable whose logarithmic value is calculated.Here is an example of log1p() in C++ language, Example Live Demo#include #include using namespace std; int main() {    int ... Read More

The function frexp() is used to break the floating point number into its binary significand and integral exponent for 2. It returns the binary significand and its range is (0.5, 1). If we pass value zero, its significand and exponent value will be zero.Here is the mathematical expression of frexp(), x = significand * (2^exponent)Here is the syntax of frexp() in C++ language, float frexp(float variable_name, int* exponent);Here, variable_name  − Any name of variable which has floating number to be decomposed into binary significant.exponent  − It is a pointer to int where value of exponent is stored.Here is an example ... Read More

C++ is a middle-level language. It was developed by Bjarne Stroustrup in 1979. It is just an enhancement to C language and an object-oriented language. C# is modern and object-oriented language developed by Anders Hejlsberg. It is a part of the .NET framework. It is designed for Common Language Infrastructure (CLI). It is also a popular language. Difference between C++ and C# Both languages are object-oriented languages. C++ has low level of abstraction while C# has high level of abstraction. In C++, the program can be coded for any platform while in C#, the program is targeted towards windows ... Read More

Exceptions are problems that arise at the time of execution of a program. They are events that are thrown at runtime. They protect the code and allow the program to run even after an exception is thrown. Exception handling is used to handle the exceptions. Catching All Exceptions To handle all exceptions in C++, use try and catch blocks. Write the code that may generate exceptions inside a try block (try { ... }), and handle or print the exception inside a corresponding catch block (catch(...) { ... }). Syntax Following is the syntax of catch block in C++: ... Read More

Exception handling is used to handle the exceptions. We can use try catch block to protect the code. Exception can be thrown anywhere within the code block. The keyword “throw” is used to throw an exception.Here is an example of throw in C++ language,Example Live Demo#include using namespace std; int display(int x, int y) {    if( y == 0 ) {       throw "Division by zero condition!";    }    return (x/y); } int main () {    int a = 50;    int b = 0;    int c = 0;    try {       c = display(a, b);       cout