c++ average
// Average of a float
float avg(float numbers[]) {
int arraylength = sizeof(arr)/sizeof(arr[0]);
float sum = 0;
for (int i = 0; i < arraylength; i++) {
sum += numbers[i];
}
return sum / arraylength;
}c++ average
// Average of a float
float avg(float numbers[]) {
int arraylength = sizeof(arr)/sizeof(arr[0]);
float sum = 0;
for (int i = 0; i < arraylength; i++) {
sum += numbers[i];
}
return sum / arraylength;
}what does : mean in c++
for ( range_declaration : range_expression )
loop_statement
Parameters :
range_declaration :
a declaration of a named variable, whose type is the
type of the element of the sequence represented by
range_expression, or a reference to that type.
Often uses the auto specifier for automatic type
deduction.
range_expression :
any expression that represents a suitable sequence
or a braced-init-list.
loop_statement :
any statement, typically a compound statement, which
is the body of the loop.what does : mean in c++
// Illustration of range-for loop
// using CPP code
#include <iostream>
#include <vector>
#include <map>
//Driver
int main()
{
// Iterating over whole array
std::vector<int> v = {0, 1, 2, 3, 4, 5};
for (auto i : v)
std::cout << i << ' ';
std::cout << '\n';
// the initializer may be a braced-init-list
for (int n : {0, 1, 2, 3, 4, 5})
std::cout << n << ' ';
std::cout << '\n';
// Iterating over array
int a[] = {0, 1, 2, 3, 4, 5};
for (int n : a)
std::cout << n << ' ';
std::cout << '\n';
// Just running a loop for every array
// element
for (int n : a)
std::cout << "In loop" << ' ';
std::cout << '\n';
// Printing string characters
std::string str = "Geeks";
for (char c : str)
std::cout << c << ' ';
std::cout << '\n';
// Printing keys and values of a map
std::map <int, int> MAP({{1, 1}, {2, 2}, {3, 3}});
for (auto i : MAP)
std::cout << '{' << i.first << ", "
<< i.second << "}\n";
}C++ meaning ::
struct Base {
void foo();
};
struct Derived : Base {
void foo();
void bar() {
Derived::foo();
Base::foo();
}
};Copyright © 2021 Codeinu
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