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#include <iostream>
#include <string>
#include <cstring> // includes C string.h
#include <typeinfo>
#include <cstdint>
#define CAPACITY 5000
//#define LENGTH 4
/*
* cout = Character out
* cin = Character in
* :: == Scope resolution operator
* << == insertion operator
*/
using namespace std;
void average() {
int arr[5];
arr[0] = 4;
arr[1] = 3;
arr[2] = 5;
arr[3] = 2;
arr[4] = 4;
int i = 0;
float avg = 0;
for (i = 0; i < 5; i++)
avg += arr[i];
avg /= 5;
std::cout << "Average: " << avg << std::endl;
}
void tcast() {
float f = -7.44f;
int32_t s;
uint32_t u;
s = f; // Implicit type casting from float to int32
u = s; // Implicit casting from int32 to uint32, we'll end up seeing 2's
// complement version of variable s, but interpreted as an
// unsigned int.
std::cout << "float: " << f << endl;
std::cout << "int32: " << s << endl;
std::cout << "uint32: " << u << endl;
}
void strings() {
const int LENGTH = 25;
char ch_arr1[LENGTH] = "Howdy! I'm a string... ";
char ch_arr2[] = "Sup bro?";
string std_str1 = "Hi everyone! ";
string std_str2 = "How's everybody doing?";
// Concatenate strings the traditional way
strcat(ch_arr1, ch_arr2);
std::cout << ch_arr1 << std::endl;
// Concatenate strings the C++ way using operator overloading
std::cout << std_str1 + std_str2 << std::endl;
std::cout << "Operator overloaded" << std::endl;
}
void t_inference() {
auto a = 8;
auto b = 214312351235739;
auto c = 3.14f;
auto d = 3.14;
auto e = true;
auto f = 'd';
std::cout << "STARTING Type Inference" << std::endl;
std::cout << "Type of a: " << typeid(a).name() << std::endl;
std::cout << "Type of b: " << typeid(b).name() << std::endl;
std::cout << "Type of c: " << typeid(c).name() << std::endl;
std::cout << "Type of d: " << typeid(d).name() << std::endl;
std::cout << "Type of e: " << typeid(e).name() << std::endl;
std::cout << "Type of f: " << typeid(f).name() << std::endl;
}
void varplay() {
int a, b = 5;
float c = 2.4f;
double d = 9.234545;
long double ld = 9.234545;
char e = 'e';
bool myBool = false;
string str = "This is a big string I don't care how it is handled";
std::cout << "Size of int: " << sizeof(a) << " sizeof float: " <<
sizeof(c) << " sizeof double: " << sizeof(d) <<
" sizeof long double: " << sizeof(ld) << " sizeof char: " <<
sizeof(e) << " sizeof bool: " << sizeof(myBool) << std::endl;
std::cout << "This is my string: " << str << std::endl;
}
int main() {
string str;
#ifdef CAPACITY
int32_t cap = CAPACITY;
uint32_t small = 37;
const int LENGTH = 4;
int myArr[LENGTH];
myArr[0] = 3;
myArr[1] = 4;
myArr[2] = 5;
myArr[3] = 6;
cap += small;
#endif
std::cout << "Please enter your first name: ";
cin >> str;
std::cout << "Hello " << str << ", welcome to the world!" << std::endl;
// Just relies on using namespace
cout << "Hello World, with namespace" << endl;
// varplay();
t_inference();
#ifdef DEBUG
std::cout << "DEBUGGING..." << std::endl;
std::cout << "Array size: " << LENGTH << std::endl;
std::cout << "Arr[0] = " << myArr[0] << std::endl;
std::cout << "Arr[1] = " << myArr[1] << std::endl;
std::cout << "Arr[2] = " << myArr[2] << std::endl;
std::cout << "Arr[3] = " << myArr[3] << std::endl;
#endif
#ifdef CAPACITY
std::cout << "Current CAPS: " << cap << std::endl;
#endif
strings();
tcast();
average();
return 0;
}
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