diff options
| -rw-r--r-- | 3p43.cpp | 35 | ||||
| -rw-r--r-- | 3p44.cpp | 52 | ||||
| -rw-r--r-- | 3p45.cpp | 49 | ||||
| -rw-r--r-- | multi-arr-test.cpp | 3 |
4 files changed, 139 insertions, 0 deletions
@@ -2,6 +2,7 @@ #include <vector> #include "sales_data.hpp" #include "sales_item.hpp" +#include <iterator> /* * @@ -11,5 +12,39 @@ */ int main () { + + int ia[3][4] = { + {1,2,3,4}, + {5,6,7,8}, + {9,10,11,12} + }; + + for (int (&a)[4] : ia) { // A reference to an array of 4 int's + // I'll be honest i would not have figured that out myself, i did search the internet for answers. + for (int aa : a) { + std::cout << aa << " "; + } + + std::cout << std::endl; + } + + std::cout << std::endl; + for(size_t i = 0 ; i != 3 ; ++i) { + for(size_t j = 0 ; j != 4 ; ++j) { + std::cout << ia[i][j] << " "; + } + + std::cout << std::endl; + } + + std::cout << std::endl; + for(int (*p)[4] = std::begin(ia) ; p != std::end(ia) ; ++p) { + for(int *pp = std::begin(*p) ; pp != std::end(*p) ; ++pp) { + std::cout << *pp << " "; + } + + std::cout << std::endl; + } + return 0; } diff --git a/3p44.cpp b/3p44.cpp new file mode 100644 index 0000000..f098169 --- /dev/null +++ b/3p44.cpp @@ -0,0 +1,52 @@ +#include <iostream> +#include <vector> +#include "sales_data.hpp" +#include "sales_item.hpp" +#include <iterator> + +/* + * + * 3.44 + * + * + */ + +int main () { + + int ia[3][4] = { + {1,2,3,4}, + {5,6,7,8}, + {9,10,11,12} + }; + + using int_arr4 = int[4]; // I'll be honest i dont like this whole 'using' and 'typedef' + // It just feels like obfuscating the code when you really don't need to. + for (int_arr4 &a : ia) { // A reference to an array of 4 int's + // I'll be honest i would not have figured that out myself, i did search the internet for answers. + for (int aa : a) { + std::cout << aa << " "; + } + + std::cout << std::endl; + } + + std::cout << std::endl; + for(size_t i = 0 ; i != 3 ; ++i) { + for(size_t j = 0 ; j != 4 ; ++j) { + std::cout << ia[i][j] << " "; + } + + std::cout << std::endl; + } + + std::cout << std::endl; + for(int_arr4 *p = std::begin(ia) ; p != std::end(ia) ; ++p) { + for(int *pp = std::begin(*p) ; pp != std::end(*p) ; ++pp) { + std::cout << *pp << " "; + } + + std::cout << std::endl; + } + + return 0; +} diff --git a/3p45.cpp b/3p45.cpp new file mode 100644 index 0000000..0116a88 --- /dev/null +++ b/3p45.cpp @@ -0,0 +1,49 @@ +#include <iostream> +#include <vector> +#include "sales_data.hpp" +#include "sales_item.hpp" +#include <iterator> + +/* + * + * 3.45 + * + * + */ + +int main () { + + int ia[3][4] = { + {1,2,3,4}, + {5,6,7,8}, + {9,10,11,12} + }; + + for (auto &a : ia) { + for (auto aa : a) { + std::cout << aa << " "; + } + + std::cout << std::endl; + } + + std::cout << std::endl; + for(size_t i = 0 ; i != 3 ; ++i) { + for(size_t j = 0 ; j != 4 ; ++j) { + std::cout << ia[i][j] << " "; + } + + std::cout << std::endl; + } + + std::cout << std::endl; + for(auto p = std::begin(ia) ; p != std::end(ia) ; ++p) { + for(auto pp = std::begin(*p) ; pp != std::end(*p) ; ++pp) { + std::cout << *pp << " "; + } + + std::cout << std::endl; + } + + return 0; +} diff --git a/multi-arr-test.cpp b/multi-arr-test.cpp index bdd5306..9abf500 100644 --- a/multi-arr-test.cpp +++ b/multi-arr-test.cpp @@ -25,6 +25,7 @@ int main () { for(auto b : a) { std::cout << b << " "; } + std::cout << std::endl; } @@ -42,6 +43,7 @@ int main () { for(auto b : a) { std::cout << b << " "; } + std::cout << std::endl; } @@ -50,6 +52,7 @@ int main () { for(auto aa = std::begin(*a) ; aa != std::end(*a) ; ++aa) { std::cout << *aa << " "; } + std::cout << std::endl; } |