finish copy.c demo

c_programming/files/copy.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+int main(void)
+{
+    FILE *input = fopen("in.txt", "r");
+    if (input == NULL)
+    {
+        perror("Failed to open in.txt");
+        return 1;
+    }
+    FILE *output = fopen("out.txt", "w");
+    if (output == NULL)
+    {
+        perror("Failed to open out.txt");
+        fclose(input);
+        return 1;
+    }
+    char c;
+    while (fread(&c, sizeof(char), 1, input) != 0)
+    {
+        fwrite(&c, sizeof(char), 1, output);
+    }
+}
+
+/*
+TODO:
++ clone: clone git repository and start working on copy.c
++ first: go through part 3 of cs50 week 4 memory section.pdf
++ make: get copy.c compiling with make
++ complete: fix all problems and ensure the demo program works as intended
++ wait: if I need to go work on another file, it will go in a wait: task.
+*/ 

c_programming/files/in.txt

@@ -0,0 +1 @@
+hi!