C++ Programming Code Examples
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Computing sum with template arrays for double array
/* Computing sum with template arrays for double array */
#include <iostream>
#include <vector>
using std::cout;
using std::endl;
using std::vector;
template <typename Array>
double vectorSum(Array a, long count) { // Array can be a pointer or an iterator
double sum = 0.0;
for (long i = 0; i<count; ++i)
sum += a[i];
return sum;
}
int main() {
double temperature[] = { 10.5, 20.0, 8.5 };
cout << "array vectorSum = "
<< vectorSum(temperature, sizeof temperature/sizeof temperature[0])
<< endl;
return 0;
}
/*
array vectorSum = 39
*/
#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program.
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As the name already suggests, these operators help in assigning values to variables. These operators help us in allocating a particular value to the operands. The main simple assignment operator is '='. We have to be sure that both the left and right sides of the operator must have the same data type. We have different levels of operators. Assignment operators are used to assign the value, variable and function to another variable. Assignment operators in C are some of the C Programming Operator, which are useful to assign the values to the declared variables. Let's discuss the various types of the assignment operators such as =, +=, -=, /=, *= and %=. The following table lists the assignment operators supported by the C language:
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