#include <stdio.h>
int main() {
    int a = 10, b = 5;
    printf("a == b: %d\n", a == b);   // 0 (False)
    printf("a != b: %d\n", a != b);   // 1 (True)
    printf("a > b:  %d\n", a > b);    // 1 (True)
    printf("a < b:  %d\n", a < b);    // 0 (False)
    printf("a >= b: %d\n", a >= b);   // 1 (True)
    printf("a <= b: %d\n", a <= b);   // 0 (False)
    // Relational + Arithmetic একসাথে
    printf("a + b > 12: %d\n", a + b > 12); // 1 (True) কারণ 15 > 12
    return 0;
}

#include <stdio.h>
int main() {
    int a = 10, b = 5, c = 0;
    // AND Operator
    if (a > 0 && b > 0)
        printf("Both positive\n"); // Print হবে
    // OR Operator
    if (a > 0 || c > 0)
        printf("At least one positive\n"); // Print হবে
    // NOT Operator
    if (!(a == b))
        printf("a is not equal to b\n"); // Print হবে
    // Short-Circuit Evaluation উদাহরণ
    if (c != 0 && a/c > 2) // এখানে a/c Execute হবে না
        printf("Safe division\n");
    return 0;
}

#include <stdio.h>
int main() {
    int a = 5, b = 5;
    int x = ++a;  // Pre: a=6, x=6
    int y = b++;  // Post: y=5, b=6
    printf("x = %d, a = %d\n", x, a); // x=6, a=6
    printf("y = %d, b = %d\n", y, b); // y=5, b=6
    
    // Compound Assignment
    int c = 10;
    c += 5;  // c = 15
    c -= 3;  // c = 12
    c *= 2;  // c = 24
    c /= 4;  // c = 6
    c %= 4;  // c = 2
    printf("Final c = %d\n", c);
    return 0;
}

#include <stdio.h>
int main() {
    // Comma Operator ব্যবহার
    int a, b;
    a = (b = 5, b + 3, b * 2); // a = 10
    printf("a = %d, b = %d\n", a, b);
    
    // for Loop-এ Comma Operator
    for (int i = 0, j = 10; i < j; i++, j--)
        printf("%d %d\n", i, j);
    
    return 0;
}

#include <stdio.h>
int main() {
    int a = 5, b = 3, c = 2;
    
    // Precedence উদাহরণ
    int x = a + b * c;      // 5 + (3*2) = 11 (* আগে)
    int y = (a + b) * c;    // (5+3) * 2 = 16 () আগে
    int z = a == b + c;     // 5 == (3+2) → 5 == 5 → 1 (+ আগে)
    
    printf("x = %d\n", x); // 11
    printf("y = %d\n", y); // 16
    printf("z = %d\n", z); // 1
    
    // Associativity উদাহরণ
    int p = 10, q = 5, r = 2;
    int m = p - q - r;  // (10-5)-2 = 3 (Left to Right)
    int n = p = q = r;  // p=(q=(r=2)) → সব = 2 (Right to Left)
    
    printf("m = %d\n", m); // 3
    printf("n = %d, p = %d, q = %d\n", n, p, q); // 2, 2, 2
    
    return 0;
}

#include <stdio.h>
int main() {
    // Implicit Type Conversion
    int a = 10;
    float b = 3.5;
    float result1 = a + b;  // a automatically float-এ convert
    printf("Implicit: %.2f\n", result1); // 13.50
    
    // Integer Division সমস্যা
    int x = 10, y = 3;
    float div1 = x / y;      // 3.00 (ভুল! আগে int division, পরে float)
    float div2 = (float)x / y; // 3.33 (সঠিক! Type Casting)
    printf("Without cast: %.2f\n", div1);
    printf("With cast: %.2f\n", div2);
    
    // Explicit Type Casting
    double d = 9.87;
    int i = (int)d;  // d কে int-এ convert
    printf("Casted: %d\n", i); // 9 (দশমিক অংশ বাদ)
    
    char c = 'A';
    int ascii = (int)c;  // char to int
    printf("ASCII of %c = %d\n", c, ascii); // 65
    
    return 0;
}

#include <stdio.h>
int main() {
    char ch;
    printf("Enter a character: ");
    ch = getchar();  // একটি character পড়া
    printf("You entered: ");
    putchar(ch);     // একটি character লেখা
    putchar('\n');   // Newline
    
    // getchar() রিটার্ন Value দেখা
    int val = getchar();
    printf("ASCII Value: %d\n", val);
    
    return 0;
}

#include <stdio.h>
int main() {
    printf("Hello\nWorld\n");    // \n ব্যবহার
    printf("Name:\tRahul\n");    // \t ব্যবহার
    printf("Path: C:\\folder\n"); // \\ ব্যবহার
    printf("He said \"Hi\"\n");  // \" ব্যবহার
    printf("It\'s okay\n");      // \' ব্যবহার
    printf("Line1\rLine2\n");    // \r ব্যবহার
    printf("Back\bspace\n");     // \b ব্যবহার
    printf("\a");                // \a - Beep Sound
    return 0;
}