#include <stdio.h>

int main(void) {
    printf("%d %d %d %d\n", 17 / 5, 17 % 5, -17 / 5, -17 % 5);   /* truncates toward 0 */
    printf("%.2f\n", 17 / 5.0);                                   /* one double → real division */
    int i = 5;
    int a = i++;      /* a = 5, then i = 6 */
    int b = ++i;      /* i = 7, then b = 7 */
    printf("a=%d b=%d i=%d\n", a, b, i);
    return 0;
}

3 2 -3 -2
3.40
a=5 b=7 i=7

#include <stdio.h>

int calls = 0;
int check(int v) { calls++; return v; }

int main(void) {
    printf("%d %d %d\n", 3 > 2, 3 == 2, !5);      /* results are int 1 or 0 */
    if (check(0) && check(1)) { }                 /* right side skipped */
    if (check(1) || check(1)) { }                 /* right side skipped */
    printf("calls = %d\n", calls);
    return 0;
}

1 0 0
calls = 2

#include <stdio.h>

int main(void) {
    int x = 10;
    x += 5; x *= 2; x -= 6; x /= 4; x %= 4;
    printf("x = %d\n", x);

    int a, b;
    a = b = 7;                          /* assignment is an expression, right-assoc */
    int max = (a > 3) ? a : 3;          /* conditional operator */
    int last = (a++, b++, a + b);       /* comma: evaluate left, yield right */
    printf("%d %d %d %d\n", a, b, max, last);
    return 0;
}

x = 2
8 8 7 16

#include <stdio.h>

int main(void) {
    int flags = 6;
    /* == binds tighter than &:  flags & (4 == 4)  →  6 & 1  →  0 */
    printf("%d\n", flags & 4 == 4 ? 1 : 0);
    printf("%d\n", (flags & 4) == 4 ? 1 : 0);

    /* + binds tighter than << :  1 << (2 + 1) */
    printf("%d\n", 1 << 2 + 1);

    int arr[] = {10, 20, 30};
    int *p = arr;
    int v = *p++;      /* *(p++): read 10, then advance p */
    printf("%d %d\n", v, *p);
    return 0;
}

0
1
8
10 20

#include <stdio.h>

int main(void) {
    int i = 1;
    i = i++ + ++i;
    printf("%d\n", i);
    return 0;
}