finished 4, added 5

Author: mohabgabber

3-data-types.c

@@ -4,31 +4,31 @@
 
 int main(void)
 {
-    //* char variables
+    //* Char variables
     char mychar = 'C'; //* Must be inside single quotation marks
-    printf("%c\n", mychar);
+    printf("Char: %c\n", mychar);
 
     //* array of chars
     //* when assigning a value to an array of characters it must be inside double quotation marks
     char mystring[6] = "Hello"; //* This string can have a maximum of 5 chars, the final one is for the null character.
-    printf("%s\n", mystring);
+    printf("Fixed-Size string: %s\n", mystring);
 
     char mysecondstring[] = "I am free!"; //* Strings can also be specified without a specific size
-    printf("%s\n", mysecondstring);
+    printf("A string with no specified length: %s\n", mysecondstring);
 
     //* Boolean Variables
-    bool myboolean = true;     //* A boolean variable can only be either true, or false. Which is represented as the integer 1 for true, and 0 for false
-    printf("%d\n", myboolean); //* This will print 1, because the value is true
+    bool myboolean = true;              //* A boolean variable can only be either true, or false. Which is represented as the integer 1 for true, and 0 for false
+    printf("Boolean: %d\n", myboolean); //* This will print 1, because the value is true
 
     //* Numeric Variables
     int myinteger = 100; //* Integer values can be between -2,147,483,648 to +2,147,483,647
-    printf("%d\n", myinteger);
+    printf("Integer: %d\n", myinteger);
 
     float myfloat = 100.1254; //* 6 decimal points
-    printf("%f\n", myfloat);
+    printf("Float: %f\n", myfloat);
 
     double mydouble = 10000.545455; //* 15 decimal points
-    printf("%lf\n", mydouble);
+    printf("Double: %lf\n", mydouble);
     return 0;
 }
 

4-advanced-data-types-part-1.c

@@ -3,5 +3,24 @@
 //* 4 - Advanced Data Types, Part 1
 int main(void)
 {
+    //* char variables
+    unsigned char mychar = 68; //* Can hold a value from 0 to 255 (1 Byte). This will print out "D" because 68 corresponds to D in the ascii table
+    printf("Char: %c\n", mychar);
+    //* Numeric Variables
+    long long int mysuperlongint = 5999999999;                        //* long long int holds 8 bytes of data, and can have values between -9 quintillion to 9 quintillion, and we use the format specifier %lld
+    unsigned long long int myunsignedlonglongint = 35345565343454364; //* same as long long int but with no negative values, we use the format specifier %llu
+    unsigned int myint = 2;                                           //* Same as int but doesn't hold negative values
+    short int myshortint = 3;                                         //* Unlike normal int which hold 4 bytes of data, a short int can only hold 2 bytes
+    unsigned short int myunsignedshortint = 5;                        //* Same as short int but doesn't hold negative values
+    printf("Long long int: %lld\nUnsigner long long int: %llu\nUnsigned int: %u\nShort int: %d\nUnsigned short int: %d\n",
+           mysuperlongint, myunsignedlonglongint, myint, myshortint, myunsignedshortint); //* Unsigned int uses the format specifier %u, not %d
+
     return 0;
-}
+}
+/*
+!Note
+* The keyword unsigned means that the value cannot be negative number
+* By default datatypes are signed, meaning they can hold negative and positive values
+* You can declare short int without typing the "int" keyword (example: short myint = 2;)
+* Normal int data type is considered long int, that is why there is another data type long long, to represent huge numbers
+*/

5-advanced-data-types-part-2.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+//* 5 - Advanced Data Types, Part 2
+int main(void)
+{
+    return 0;
+}

README.md

@@ -27,5 +27,6 @@ Pull requests are most welcome <3
 | [2-variables-overview.c](https://github.com/mohabgabber/seecheatsheet/blob/main/2-variables-overview.c)                 | A very simple introduction to initializing variables and assigning values to them. |
 | [3-data-types.c](https://github.com/mohabgabber/seecheatsheet/blob/main/3-data-types.c)                                 | Basic Data types in C explained                                                    |
 | [4-advanced-data-types-part-1.c](https://github.com/mohabgabber/seecheatsheet/blob/main/4-advanced-data-types-part-1.c) | Advanced Data Types, Part 1                                                        |
+| [5-advanced-data-types-part-2.c](https://github.com/mohabgabber/seecheatsheet/blob/main/5-advanced-data-types-part-2.c) | Advanced Data Types, Part 2                                                        |
 ## Note
 I recommend installing the extension "Better Comments" in vs code to highlight the comments and make them easier to read.