Initial commit

Author: brianobot

.gitignore

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+*.exe

README.txt

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+# Learning C
+
+this is repo containing small code snippets written to explain basic programming
+concepts with c programming language
+
+## Usage
+- Any and all code improvements are whole-heartedly accepted
+- The codes provided in this repo are under no restriction in terms of usage
+- Use the codes here wisely, as there were written by a budding c programmer
+- Any Attribution to the repo is also welcomed
+

add_2_integers.c

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+// program to add 2 integers in the C programming language
+#include <stdio.h>
+
+// start of the main function
+int main(void)
+{
+    printf("Starting the program here: \n");
+
+    int integer1, integer2; // first and second number to be entered by the user
+    // int integer2; // second number to be entered by the user
+
+    printf("Enter the first Integer:\n"); //prompt
+    scanf("%d", &integer1); // read the integer
+
+    printf("Enter the second Integer:\n"); //prompt
+    scanf("%d", &integer2); // read the second integer
+
+    int sum = integer1 + integer2; // assign total to sum
+    printf("Sum is %d\n", sum);
+
+}// end of the main function

bitwise.c

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+/* program to study the bitwise operation of the c programming language */
+#include <stdio.h>
+
+/* function main begin program execution */
+int main(void)
+{
+    char b1 = 0b00000010;
+    char b2 = 0b00000011;
+    char b30, b31, b32;
+
+    b30 = 0 & b2; /* bitwise OR*/
+    printf("the value of b30 is %d\n", b30);
+
+    b31 = (b2 >> 2) & 0b00000001;
+    printf("the value of b31 is %d\n", b31);
+
+    b32 = (b2 >> 1) & 0b00000001;
+    printf("the value of b32 is %d\n", b32);
+
+}/* end of the main function */

comma_operator.c

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+/* program to test the operation of comma in assignment expression */
+#include <stdio.h>
+
+/* function main starts program execution */
+int main(void)
+{
+    int a;
+    a = 89, 1336;
+    printf("%d\n", a);
+}

for_loop.c

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+/* program to demonstrate the operation of the for loop in c programming language */
+#include <stdio.h>
+
+/* function main starts program execution */
+int main(void)
+{
+    int my_array[100];
+    int i;
+
+    for (i=0; i<100; i++){
+        my_array[i] = 1337;
+    }
+
+    printf("The value of my_array is %a", my_array);
+
+}/* end of the main function */

if_conditions.c

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+/* this program would make decision from a condition to execute part of the program */
+#include <stdio.h>
+
+/* function main begin program execution */
+int main(void)
+{
+    puts("Enter a value for the two integers and i will tell you");
+    printf("%s", "the relation they satisfy: ");
+
+    int num1, num2; /* first and second number to be read from the user */
+
+    scanf("%d %d", &num1, &num2); /* read the two numbers from the user */
+
+    if (num1 == num2){
+        printf("%d is equal to %d\n", num1, num2);
+    } /* end if */
+
+    if (num1 != num2) {
+        printf( "%d is not equal to %d\n", num1, num2 );
+    } /* end if */
+    
+    if (num1 < num2) {
+        printf( "%d is less than %d\n", num1, num2 );
+    } /* end if */
+    
+    if (num1 > num2) {
+        printf( "%d is greater than %d\n", num1, num2 );
+    } /* end if */
+    
+    if (num1 <= num2) {
+        printf( "%d is less than or equal to %d\n", num1, num2 );
+    } /* end if */
+    
+    if (num1 >= num2) {
+        printf( "%d is greater than or equal to %d\n", num1, num2 );
+    } /* end if */
+
+} /* end function main */

if_else_block.c

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+/* program to display the decision making process with a if-else blocks and conditions to check against */
+#include <stdio.h>
+
+/* function main starts program execution */
+int main(void)
+{
+    int age; /*declare a variable to hold the age value */
+
+    printf("Enter your age: "); /* prompt */
+    scanf("%d", &age); /* gets the age value from the user*/
+
+    if (age > 18){
+        puts("Hurray! you are an Adults"); /* block to be executed if the if block condition is met*/
+    }
+    else {
+        puts("Awwwn! you are still a child"); /* block to be executed if the if block's condition is not satistied /*/
+    }
+
+
+}/* end of main function */

index.c

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+// a first program
+#include <stdio.h>
+
+// function main begins program execution
+int main(void)
+{
+    printf("Welcome to C!\n");
+} // function end

return_statement.c

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+/* c program to show the usage of the return statement in c functions */
+#include <stdio.h>
+
+/* user defined function to carry out addition on 3 integers and return the result */
+int add(int a, int b, int c){
+    int result; /* declare the result variable */
+
+    result = a + b + c; /* perform the addition in a single expression */
+    return (result); /* return the result to the caller of the function */
+}
+
+/* function main starts program execution */
+int main(void){
+    int a;
+    int b;
+
+    b  = 98;
+    a = 1 + 2 + 3 + 4;
+    b = 23 + add(32, a, a + b); /* calls the function add */
+    return (0); /* using return in the main function ends the program */
+    
+    a = 999999999; /* anythinh after the return is not executed */
+}

test_addition_of_int_to_char.c

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+/* program to test the addition of a integer type to char type */
+#include <stdio.h>
+
+/* function main starts program execution */
+int main(void)
+{
+    int a = 15;
+    char b = 'a';
+
+    printf("The sum of a and b is %d\n", a+b); /* displat the result of the summation as a formated string */
+
+    printf("The value of a is %d\n", a);
+    printf("The value of b is %d\n", b);
+
+}/* end of main function */

unary_operators.c

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+/* demonstrate use of a unary operator to check the size of an type or varaible in memory */
+#include <stdio.h>
+
+/* function main starts program execution */
+int main(void)
+{
+    int a; /* declare a integer variable a*/
+    int size; /* declare a integer variable size */
+    
+    a = 10000;
+    size = sizeof(a);
+    printf("The size of variable 'a' is %d Byte(s)\n", size);
+
+    int int_size = sizeof(int); /* checks the size of the int type*/
+    int char_size = sizeof(char); /* checks the size of the char type*/ 
+
+    printf("The size of the 'int' type is %d Byte(s)\nThe size of the 'char' type is %d\n", int_size, char_size);
+
+}/* end of the main function */

while_loop.c

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+/* program to display the syntax and use of the while loop in the c programming language */
+#include <stdio.h>
+
+/* function main starts program execution */
+int main(void)
+{
+    int a = 0;
+
+    while (a < 100){
+        printf("A is currently = %d\n", a);
+        a += 1;
+    }
+}/* end of the main function */