Lecture 4 Code Snippets

Slide 5

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    printf("%d\n", 5%4);
    printf("%d\n", 7%88);
    printf("%d\n", -20%7);
    printf("%d\n", 20%-7);
    printf("%d", -20%-7);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 7

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main(void)
{
    float num1, num2, num3, sum, average;
    printf("Enter 3 number: \n");
    scanf("%f",&num1);
    scanf("%f",&num2);
    scanf("%f",&num3);
    sum = num1 + num2 + num3;
    average = sum / 3;
    printf("Miangin = ");
    printf("%f\n", average);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 14

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>

/*
()
--   ++
-    +
! 
(type casting)
*   /   %
+   -
>   >=  <   <=
==  !=
&&
||
= *= += /= -+ %=
*/

int main()
{
    double x = -5 + 2/4.0 * (-7/8);
    printf("%.1lf\n",x);

    double y = 
    (7 + (float) (2 + (int) 1.005)) / (int) 20;

    printf("%.1lf\n",y);

    double z = 5 + 
    (double)(7 / (int)8.5 / 7.0 * 6);

    printf("%.1lf\n",z);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 16

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main(void)
{
    float num1, num2; 
    int sum;
    printf("Enter 2 number: \n");
    scanf("%f",&num1);
    scanf("%f",&num2);
    sum = (int)num1 + (int)num2;
    printf("%d\n", sum);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 17

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main(void)
{
    float num1, num2, fpart1, fpart2, sum;
    printf("Enter 2 numbers: \n");
    scanf("%f",&num1);
    scanf("%f",&num2);
    fpart1 = num1 -(int)num1;
    fpart2 = num2 -(int)num2;
    sum = fpart1 +fpart2;
    printf("%f\n",sum);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 19

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int i = 10;
    i = i+1;
    printf("%d\n",i);
    i++;
    printf("%d\n",i);
    ++i;
    printf("%d\n",i);
    i--;
    printf("%d\n",i);
    --i;
    printf("%d\n",i);
    i=i-1;
    printf("%d\n",i);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 20

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int i = 10, j;
    j = i + 1;
    printf("i = %d, j = %d\n", i , j);
    j = i++;
    printf("i = %d, j = %d\n", i , j);
    j = ++i;
    printf("i = %d, j = %d\n", i , j);
    j = i--;
    printf("i = %d, j = %d\n", i , j);
    j = --i;
    printf("i = %d, j = %d\n", i , j);
    j = i - 1;
    printf("i = %d, j = %d", i , j);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 21

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int i = 9 , j = 20;
    i+= 1;
    j /= i;

    printf("i = %d\nj = %d\n", i , j);

    i *= i + j - 6 + i / j;
    printf("i = %d\n", i);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 22

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int i, j, k, l;
    i = j = k = l = 1;
    i += j *= --k -= 3 / l ;

/*      → i += j *= --k -= 3
        → i += j *= --(k -= 3) [k = -2]
        → i += j *= --k [k = -3]
        → i += j *= -3 [j = -3]
        → i += -3 [i = -2]
        i = -2, j = -3, k = -3, l = 1
*/

    printf("i = %d, j = %d, k = %d, l = %d", i , j , k, l);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 24

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    char c = 'A', ch;
    int i;
    c++;
    printf("c = %d, c = %c\n", c, c);
    ch = c;
    ch +=3;
    printf("ch = %d, ch = %c\n", ch, ch);
    i = c - ch + 'X' - 'Z';
    printf("%d", i);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 25

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int size, i = 10;
    size = sizeof i;
    printf("%d\n", size);
    size = sizeof(i);
    printf("%d\n", size);
    size = sizeof(2000);
    printf("%d\n", size);
    size = sizeof(char);
    printf("%d\n", size);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 28

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int i, j, k, n;
    i=j=k=n=1;
    i = sizeof(int) + sizeof(char) + sizeof 10;

    printf("i:%d\n",i);

    i=j=k=n=1;
    i += j * k++ + sizeof n;
    printf("i:%d j:%d k:%d n:%d\n",i, j , k , n);

    i=j=k=n=2;
    i = j + (k = ++n); 
    printf("i:%d j:%d k:%d n:%d\n",i, j , k , n);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 29

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main()
{
    int i, j, k;
    k =i =10;
    j = i++ + k + --i;
    printf("j = %d\n", j);

    i = j =10;
    i = j + i++;
    printf("i = %d\n", i);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 31

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
int main(void)
{
    float a, b, c, x, result;
    printf("Enter a, b, c, x: ");
    scanf("%f",&a);
    scanf("%f",&b);
    scanf("%f",&c);
    scanf("%f",&x);
    result = a * x * x + b * x + c;
    printf("%f\n", result);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 33

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <math.h>

int main()
{
    double f = 36;
    printf("%lf\n", fabs(-f));

    printf("%lf\n", sqrt(f));

    printf("%lf\n", pow(f, 0.5));

    printf("%lf\n", ceil(-10.2));

    printf("%lf\n", ceil(10.2));

    printf("%lf\n", floor(-10.2));

    printf("%lf\n", floor(10.2));

    printf("%lf\n", fmax(10.1, 20.2));

    printf("%lf\n", fmin(10.1, 20.2));

    //رندش میکنه

    printf("%lf\n", rint(10.5));

    printf("%lf\n", rint(-10.2));

    printf("%lf\n", rint(20.6));

    printf("%lf\n", rint(-20.6));
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 34

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <math.h>
int main()
{
    const double PI = 3.141592653589793;
    const double E = 2.7182818284590451;

    printf("%lf\n", sin(PI));

    printf("%lf\n", cos(PI/2));

    printf("%lf\n", acos(1));

    printf("%lf\n", log(E));

    printf("%lf\n", log(10));

    printf("%lf\n", exp(1));
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 35

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <math.h>
#define PI 3.141592653589793

int main(void)
{
    float r;
    printf("Enter shoa");
    scanf("%f",&r);
    double masahat = PI * pow(r, 2);
    double mohit = 2*PI*r;
    printf("masahat = %f\n", masahat);
    printf("mohit = %f\n", mohit);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 36

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <math.h>
int main(void)
{
    float a, b, c, delta, root1, root2;
    printf("Enter a, b, c: ");
    scanf("%f", &a);
    scanf("%f", &b);
    scanf("%f", &c);    
    delta =sqrt((b * b)-(4 * a * c));
    root1 =(-b + delta)/(2 * a);
    root2 =(-b - delta)/(2 * a);
    printf("root1 = ");
    printf("%f\n", root1);
    printf("root2 = ");
    printf("%f\n", root2);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

Slide 40

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void)
{
    int r1, r2;
    srand(0);
    r1 = rand();
    printf("r1 = %d\n", r1);
    time_t t = time(NULL);
    srand(t);
    r2 = rand();
    printf("r2 = %d\n", r2);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 41

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void)
{
    time_t t = time(NULL);
    srand(t);
    int ir = rand();
    double fr =(ir + 1)/(RAND_MAX + 2.0);
    printf("%f\n", fr);
    return 0;
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}

---

Slide 42

CC++

/** By: Negin Eini-pour **/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main ()
{
    int i, n;
    time_t t;
    srand((unsigned) time(&t));

    printf("%d\n",rand() % 50);
    printf("%d\n",rand() % 50);
    printf("%d\n",rand() % 50);
    return(0);
}

#include <iostream>

int main() {
    // Your code here
    return 0;
}