​​This course will help you learn C by helping you understand fundamentals and the libraries and tools that make up the C ecosystem.

clang.tar.gz

RunC

RunCwithGNUflags

RunCwithlmflag

Run_go_file 

RunC-without_warning_flag

Compile-only

doNothing

Posix

RunCFileGo

Compile-go-file

Compile-go-debugging-file

OpenMP

Make

MPI4Threads

MPI8Threads

Octave

RunC-without_warning_flag-KS

The incredibly efficient and powerful C language forms the basis for many other languages like C++ and Java. It allows you to interact directly with memory and perform low-level computer operations, enhancing your programming skills and understanding. This makes it an excellent choice for enhancing your programming skills.

This course covers fundamental programming concepts in C, including data types, control flow, functions, input/output, and memory management. It also covers more advanced topics such as compilation, debugging, and parallel programming. The content is comprehensive yet concise, making it accessible to learners at various levels.

By taking this course, you’ll gain a solid understanding of C that will serve as a strong foundation for your programming career. Whether in the early stages of your career or looking to deepen your knowledge, this course will equip you with the skills and insights needed to excel in programming and beyond.

Learn C from Scratch

What is the correct way to declare a pointer?

What is the correct way to declare a pointer?

In the code below what is stored in `x`?
```C
int n = 50, x;
int *ptr; 
ptr = &n; 
x = *ptr;
```

In the code below what is stored in <code>x</code>?
<pre><code class="language-C">int n = 50, x;
int *ptr; 
ptr = &amp;n; 
x = *ptr;
</code></pre>

What will the code below print?

```C
int main(void) {
  int *vec;
  vec = malloc(sizeof(int) * 3);
  vec[0] = 4;
  vec[1] = 7;
  vec[2] = 11;
  printf("%d", *(vec + 2));
  free(vec);
  return 0;
}
```

What will the code below print?
<pre><code class="language-C">int main(void) {
 int *vec;
 vec = malloc(sizeof(int) * 3);
 vec[0] = 4;
 vec[1] = 7;
 vec[2] = 11;
 printf(&quot;%d&quot;, *(vec + 2));
 free(vec);
 return 0;
}
</code></pre>

What will be printed in the code below?
```C
struct Point { 
   int x, y, z; 
}; 
  
int main(void) { 
   struct Point p1 = {1, 2, 3}; 
   struct Point *p2 = &p1; 
   printf("%d %d", p2->y, p2->x); 
   return 0; 
}
```

What will be printed in the code below?
<pre><code class="language-C">struct Point { 
 int x, y, z; 
}; 
 
int main(void) { 
 struct Point p1 = {1, 2, 3}; 
 struct Point *p2 = &amp;p1; 
 printf(&quot;%d %d&quot;, p2-&gt;y, p2-&gt;x); 
 return 0; 
}
</code></pre>

Which option pairs an argument passed to the function call `myFun(?)` with its corresponding output?

```C
void myFun(int *x) {
  *x = *x * 4;
}

int main(void) {
  int y = 20;
  myFun(?);
  printf("y=%d\n", y);
  return 0;
}
```

Which option pairs an argument passed to the function call <code>myFun(?)</code> with its corresponding output?
<pre><code class="language-C">void myFun(int *x) {
 *x = *x * 4;
}

int main(void) {
 int y = 20;
 myFun(?);
 printf(&quot;y=%d\n&quot;, y);
 return 0;
}
</code></pre>

Some garbage value followed by 2 and then by 1

What values are stored in memory locations allocated for `vec`?
```C
double *vec = calloc(3, sizeof(int));
vec[1] = 2;
vec[2] = 1;
```


What values are stored in memory locations allocated for <code>vec</code>?
<pre><code class="language-C">double *vec = calloc(3, sizeof(int));
vec[1] = 2;
vec[2] = 1;
</code></pre>

Test what you’ve learned about pointers.

Introduction to C Programming

Data Types in C

C Operators and C Expressions

Control Flow in C

Functions in C

Complex Data Types

Stack vs. Heap

Pointers in C

C String

Input and Output Stream

Macros and the C Preprocessor

Header Files, Compiling, and Linking

Write a Shell in C

C Debugger

Code Profiling

Parallel Programming in C

Project: Using a Bootstrapped t-test

Conclusion

Miscellaneous

Appendix: Setting Up the Environment

Quiz on Pointers