From 412557460a6a7457b15a8890c9d7fe47f9b2b731 Mon Sep 17 00:00:00 2001
From: Erik Alexander Sandvik <erikasan@student.matnat.uio.no>
Date: Sat, 19 Oct 2019 15:35:39 +0200
Subject: [PATCH] Added programs

---
 compiling_error.txt      |  4 ++++
 function_as_argument.cpp | 11 ++++++++++
 test.cpp                 | 46 ++++++++++++++++++----------------------
 test.h                   |  5 +++++
 test2.cpp                | 19 +++++++++++++++++
 testMPI.cpp              | 24 +++++++++++++++++++++
 tuple.cpp                | 12 +++++++++++
 7 files changed, 96 insertions(+), 25 deletions(-)
 create mode 100644 compiling_error.txt
 create mode 100644 function_as_argument.cpp
 create mode 100644 test.h
 create mode 100644 test2.cpp
 create mode 100644 testMPI.cpp
 create mode 100644 tuple.cpp

diff --git a/compiling_error.txt b/compiling_error.txt
new file mode 100644
index 0000000..708fe71
--- /dev/null
+++ b/compiling_error.txt
@@ -0,0 +1,4 @@
+/home/erik/Documents/cpp/test.cpp: In function ‘double g(double (*)())’:
+/home/erik/Documents/cpp/test.cpp:15:11: error: invalid operands of types ‘int’ and ‘double (*)()’ to binary ‘operator*’
+   return 2*f;
+          ~^~
diff --git a/function_as_argument.cpp b/function_as_argument.cpp
new file mode 100644
index 0000000..7c9f461
--- /dev/null
+++ b/function_as_argument.cpp
@@ -0,0 +1,11 @@
+double Gaussian_Legendre(double a,double b,int n, function<double(double)> f){
+  double *x = new double[n];
+  double *w = new double[n];
+
+  gauleg(a,b,x,w,n);
+  double integral = 0;
+  for (int i=0; i<n;i++){
+    integral += w[i]*f(x[i]);
+      }
+  return integral;
+} 
diff --git a/test.cpp b/test.cpp
index e60dc11..08767b5 100644
--- a/test.cpp
+++ b/test.cpp
@@ -1,25 +1,21 @@
-#include <iostream>
-#include <string>
-#include <vector>
-#include <cmath>
-#include <cctype>
-#include <array>
-#include <cstdlib>
-#include <cstdio>
-using namespace std;
-
-
-int func(int, int);
-
-int main()
-{
-
-  int a = 1, b = 2;
-  cout << func(a, b);
-  return 0;
-}
-
-int func(int a, int b)
-{
-  return a + b;
-}
+#include <iostream>
+
+using namespace std;
+
+double g(double f());
+double f(double x);
+
+int main()
+{
+  return 0;
+}
+
+double g(double f())
+{
+  return 2*f;
+}
+
+double f(double x)
+{
+  return 2*x;
+}
diff --git a/test.h b/test.h
new file mode 100644
index 0000000..b835a2e
--- /dev/null
+++ b/test.h
@@ -0,0 +1,5 @@
+
+double* returnarray(double* b)
+{
+  return b;
+}
diff --git a/test2.cpp b/test2.cpp
new file mode 100644
index 0000000..496648f
--- /dev/null
+++ b/test2.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+#include <cmath>
+
+using namespace std;
+
+double func(double x);
+
+int main()
+{
+
+  return 0;
+}
+
+double func(double x)
+{
+  double value;
+  value = 4/(1.+x*x);
+  return value;
+} // end of function to evaluate
diff --git a/testMPI.cpp b/testMPI.cpp
new file mode 100644
index 0000000..de56edd
--- /dev/null
+++ b/testMPI.cpp
@@ -0,0 +1,24 @@
+#include <iostream>
+#include <omp.h>
+#define CHUNKSIZE 100
+#define N 10
+
+using namespace std;
+
+int main (int argc, char *argv[])
+{
+int i, chunk;
+float a[N], b[N], c[N];
+for (i=0; i < N; i++) a[i] = b[i] = i * 1.0;
+chunk = CHUNKSIZE;
+#pragma omp parallel shared(a,b,c,chunk) private(i)
+{
+#pragma omp for schedule(dynamic,chunk)
+for (i=0; i < N; i++) c[i] = a[i] + b[i];
+} /* end of parallel region */
+
+for (int j = 0; j != N; ++j) {
+  cout << c[i] << endl;
+}
+
+}
diff --git a/tuple.cpp b/tuple.cpp
new file mode 100644
index 0000000..c4d988a
--- /dev/null
+++ b/tuple.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+#include <tuple>
+
+using namespace std;
+
+int main()
+{
+  double a = 0, b = 2, c = 3, d = 5;
+  auto args = make_tuple (a, b, c ,d);
+  cout << get<1>(args);
+  return 0;
+}