Initial commit

.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_15" project-jdk-name="15" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/oving1.iml" filepath="$PROJECT_DIR$/.idea/oving1.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/oving1.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

rec_sum.c

+#include <stdio.h>
+
+//Task 1.1
+//Global variables, used to find their addresses
+int globalInt = 10;
+char globalChar[] = "hello";
+float globalFloat = 10.2;
+double globalD = 7.5;
+
+char globalCharUnInit;
+int globalIntUnInit;
+float globalFloatUnInit;
+double globalDUnInit;
+
+
+//Calculates the sum of the numbers 1 to n
+int sum_n(int n) {
+    //printf("Address: %p\n", &n);
+    if (n != 0) {
+        return n + sum_n(n-1);
+    }
+    else
+        return n;
+}
+
+int main() {
+    printf("Sum & recursion \n");
+    int n = 5;
+    sum_n(n);
+    printf("The sum of numbers 1 to %d is %d.\n\n", n, sum_n(n));
+
+    //Local variables, used to find their addresses
+    int localInt = 10;
+    char localChar[] = "welcome";
+    float localFloat = 3.5;
+    double localD = 1.4;
+    char localCharUnInit;
+    int localIntUnInit;
+
+    printf("\nAddresses of different variables, both local and global\n");
+	printf("Address of globalInt is %p\n", &globalInt);
+	printf("Address of globalChar is %p\n", &globalChar);
+	printf("Address of globalFloat is %p\n", &globalFloat);
+	printf("Address of globalD is %p\n", &globalD);
+	printf("Address of globalIntUnInit is %p\n", &globalIntUnInit);
+	printf("Address of globalCharUnInit is %p\n", &globalCharUnInit);
+	printf("Address of globalFloatUnInit is %p\n", &globalFloatUnInit);
+	printf("Address of globalDUnInit is %p\n", &globalDUnInit);
+	printf("Address of localInt is %p\n", &localInt);
+	printf("Address of localChar is %p\n", &localChar);
+	printf("Address of localFloat is %p\n", &localFloat);
+	printf("Address of localDouble is %p\n", &localD);
+	printf("Address of localIntUnInit is %p\n", &localIntUnInit);
+    printf("Address of localCharUnInit is %p\n", &localCharUnInit);
+
+    //Comparison of local addresses
+    int integer = 100;
+    int integer2 = 20;
+    int integer3 = 67;
+
+    char character[] = "k";
+    char character2[] = "abcde";
+
+    int undefined;
+    int undefined2;
+    int undefined3;
+
+    printf("\n\nAddresses of local initialised vs uninitialised variables\n");
+    printf("Address of integer is %p\n", &integer);
+    printf("Address of integer2 is %p\n", &integer2);
+    printf("Address of integer3 is %p\n", &integer3);
+
+    printf("Address of character is %p\n", &character);
+    printf("Address of character2 is %p\n", &character2);
+
+    printf("Address of undefined is %p\n", &undefined);
+    printf("Address of undefined2 is %p\n", &undefined2);
+    printf("Address of undefined3 is %p\n", &undefined3);
+
+	return 0;
+}
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