This course will help you learn C by helping you understand C 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

Do you want to get a grip on the basic programming concepts from scratch? Do you feel the need to have a better and enhanced understanding of how it all works?  Well, you've come to the right place. This course outlines data types, control flow, functions, input/output, memory, compilation, debugging and other advanced topics in a comprehensive, yet concise manner.

C is where it all begins and where you should also begin to embark on your programming journey. 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 low-level computer operations, thereby enhancing your programming skills and deepening your understanding. This comprehensive and detailed course will introduce you to all the basic and advanced programming concepts of C language. In addition, it also addresses memory, debugging and parallel programming in C.

Sounds awesome? Let's dive in!

Learn C from Scratch

Which of the following is the correct way to declare a pointer?

Which of the following 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(*(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(*(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 of the following options pairs an argument passed to the function call `myFun(?)` with the 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 of the following options pairs an argument passed to the function call <code>myFun(?)</code> with the 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>

Let's put what you've learned about pointers to test!

Why Program in C?

Basic Types and Statements

Operators and Expressions

Control Flow

Functions

Complex Data Types

Memory : Stack vs Heap

Pointers

Strings

Input and Output

Macros and the C Preprocessor

Header Files, Compiling and Linking

Debugging

Speeding Up Your Code

Advanced Topic: Parallel Programming in C

Project: Using a Bootstrapped t-test

Miscellaneous

Conclusion

Appendix: Setting Up the Environment

Quiz on Pointers