Control Structures
Control structures are features of programming languages that influence the code flow. Two common examples are loops and conditions. The task here is to demonstrate control structures supported by different programming languages.
Control Structures
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
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Iterative
These control structure operate on datasets.
C++
for_each
Compiler: GCC 4.1.1
#include <iostream> // std::cout, std::endl #include <vector> // std::vector #include <algorithm> // std::for_each struct sum { int _sum; sum() : _sum(0) {}; // Initialize sum with 0; void operator() (int a) { _sum += a; } // this function will be called for every element }; int main() { std::vector<int> v; v.push_back(10); v.push_back(23); v.push_back(34); /* Note that for_each gets a fresh instance of sum passed, * applies every element beginning with *v.begin() up to, * but not including v.end() to the function object * and returns a copy of it. */ sum the_sum = std::for_each(v.begin(), v.end(), sum()); std::cout << "The sum is " << the_sum._sum << std::endl; return 0; }
Tcl
foreach
foreach i {foo bar baz} { puts "$i" }
UNIX Shell
for
Interpreter: Bourne Again SHell
#!/bin/bash ARRAY="VALUE1 VALUE2 VALUE3 VALUE4 VALUE5" for ELEMENT in $ARRAY do echo $ELEMENT # Print $ELEMENT done
Interpreter: Debian Almquist SHell
#!/bin/sh ARRAY="VALUE1 VALUE2 VALUE3 VALUE4 VALUE5" for ELEMENT in $ARRAY do echo $ELEMENT # Print $ELEMENT done