first commit

Author: DeveloperAmrit

Diff for: .vscode/tasks.json

@@ -0,0 +1,28 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: gcc.exe build active file",
+            "command": "C:\\MinGW\\bin\\gcc.exe",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}\\${fileBasenameNoExtension}.exe"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

Diff for: 1.c

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+#include <stdio.h>                               // Pre processor command
+
+int main(int argc, char const *argv[])            // program starts from main(), int as it returns integer
+{
+    printf("Hello world!");
+    return 0;
+}
+
+// .exe file of this does not auto-change itself so have to make different .exe everytime

Diff for: 1.exe

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+#include <stdio.h>
+
+int main(int argc, char const *argv[])
+{
+    int a,b;
+    printf("Enter number a\n");
+    scanf("%d",&a);
+
+    printf("Enter number b\n");
+    scanf("%d",&b);
+
+    printf("The sum of %d and %d is %d\n",a,b,a+b);
+    printf("The differene  %d - %d is %d\n",a,b,a-b);
+    printf("The multiplication of %d and %d is %d\n",a,b,a*b);
+    printf("The quotienf of %d/%d is %d\n",a,b,a/b);
+    return 0;
+}

Diff for: 2.exe

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+// Tokens
+
+#include <stdio.h>
+
+int main(void)
+{
+    printf
+    (
+    "Hello world \n"
+    )
+    ;
+    return 0;
+}
+
+// each line = one token

Diff for: 2_taking_input.c

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+#include <stdio.h>
+
+int main(void)
+{
+    // deceleration 
+    int a;
+    // initialization
+    a = 78;
+    // deceleration and initialization
+    int b = 90;
+
+    
+    return 0;
+}
+
+/*RULES of decleration of variable:
+
+) Can contain alphabets,digits,underscore
+) Cannot start with digit
+) No space and no reserved keyword is allowed
+
+*/
+
+// memory = RAM for any program

Diff for: 3_synatx_of_c.c

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+#include <stdio.h>
+
+int main(void)
+{
+    // for my (64-bit) artecture 
+    printf("%lu \n",sizeof(int));              // returns 4 bytes
+    printf("%lu \n",sizeof(unsigned int));
+    printf("%lu \n",sizeof(long int));
+    return 0;
+}
+
+/* 
+Basic data types
+
+1) int                              
+2) char
+3) float
+4) double
+
+Derived data type
+
+1) array
+2) pointer
+3) structure
+4) union
+
+Enumeration data type
+
+1) enum
+
+Void data type
+
+1) void
+
+*/
+
+/* int derivatives  (for 32-bit artitecture)
+
+int, signed int, short int, signed short int : -32,000 to 32,000  ( -32,768 to 32,767 )
+unsigned int, unsigned short int : 0 to 65,000                    ( 0 to 65535)   
+long int, signed long int : -2 billion to 2 billion
+unsigned long int : 0 to 4 billion
+
+------------> Varies artitecture to artitecture
+*/

Diff for: 4_variable.c

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+#include <stdio.h>
+
+int main(void){
+
+}
+
+/*
+OPERATORS : Symbol which make 2 operands one
+
+// Arithematic operators + , - , * , / , %
+
+//  Relation operatos == , != , > , < , >= , <=    ( 0 = false, 1 = true)
+
+// Logical operatos && , || , !
+
+*/

Diff for: 5_data_type.c

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+#include <stdio.h>                              
+
+int main(int argc, char const *argv[])            
+{
+    printf("Hello world!");
+    return 0;
+}
+
+/*
+Processes in c compilation
+
+1) Pre-processing  : Removes comments, expand macros and resolve # commands (literally copy pastes the stdio.h file content) --> Generates .i file
+2) Compilation : Changes high level language to assembly language --> Generates .s
+3) Assembly : Changes assembly language to binary --> Generates .o
+4) Linker : Links all binary .o files (sil deta hai) --> Generates .exe
+
+IS OE
+ */