CS106 Lab 3 - Modulus
- 1. Lab 3 CS106 - Fundamentals of Computer Science Presented by TA. Nada Kamel
- 2. Agenda Arithmetic Operators C++ Operator Precedence Modulus <cmath> library <iomanip> library Example Hands-on problems Presented by TA. Nada Kamel
- 3. Arithmetic Operators Presented by TA. Nada Kamel
- 4. Arithmetic Operators Operator Description + Addition - Subtraction * Multiplication / Division % Modulo Presented by TA. Nada Kamel
- 5. Operators Precedence Presented by TA. Nada Kamel
- 6. Priority of operators 1. () (brackets) 2. * , /, % (Multiplication, Division, Modulus) 3. + , - (Addition, Subtraction) 4. = (Assignment operator) Examples: int x = 3 * 5 / 2; // x = 7 int x = 3 * (5 / 2); // x = 6 Presented by TA. Nada Kamel
- 7. Priority of operators (Cont.) The most important rule when assigning is the right-to-left rule.. The assignment operation always takes place from right to left, and never the other way. Example int a; int x = 7; int y = 3; a = x + y; Presented by TA. Nada Kamel
- 8. Modulus Presented by TA. Nada Kamel
- 9. Modulus Presented by TA. Nada Kamel It is represented by a percentage sign (%), gives the remainder of a division of two values. Example: int remainder = 11 % 3; The value stored in variable remainder will be equal to 2, since dividing 11 by 3 results in 3, with a remainder of 2.
- 10. Modulus (Cont.) Presented by TA. Nada Kamel
- 11. Libraries Presented by TA. Nada Kamel
- 12. <cmath> library It contains functions to compute common mathematical operations and transformations: Functions like power, square root, cosine, sine, tangent, etc. Presented by TA. Nada Kamel Function In C++ 2 to the power of 6 ( 26 ) pow(2, 6) Square root of 15 sqrt(15) cosine of 60 cos(60 * PI / 180) sine of 30 sin(30 * PI / 180)
- 13. <iomanip> library It contains many functions to manipulate in output of parameters. One of the functions we will use in this course is setprecision Sets the decimal precision to be used to format floating-point values on output operations. Example: cout << fixed << setprecision(3) << 12.45657 << endl; Presented by TA. Nada Kamel
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- 15. <iomanip> library (Cont.) Another function that we are going to use is setw which sets field width. Presented by TA. Nada Kamel
- 16. Example on setprecision Presented by TA. Nada Kamel
- 17. Example Write a program to calculate the average of 3 numbers entered by the user. Round the average to 2 decimal places. Example 1: Input: 30.9 45.73 60 Output : "The average equals 45.5433 and is rounded to 45.54" Example 2: Input: 10.6759 67.892 42.86 Output: "The average equals 40.476 and is rounded to 40.48" Presented by TA. Nada Kamel
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- 19. Hands-on Problems Presented by TA. Nada Kamel
- 20. Problem 1 You take a bag of mini chocolate bars to the camp. You are going to share them with the guys in your tent. There are 7 guys in the tent and 100 chocolate bars. Write a C++ program to compute How many can each person have if you want everyone to have the same amount? How many chocolate bars will be left over? Presented by TA. Nada Kamel
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- 22. Problem 2 Write a C++ program that reads a large number of seconds and displays it in terms of an integer number of hours, an integer number of minutes, and remaining seconds (if any). Examples: Input Sample: Output Sample: 1432 00:23:52 Input Sample: Output Sample: 5382 01:29:42 Presented by TA. Nada Kamel
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- 24. Problem 3 Write a C++ program to enter an integer number of 4 digits and display it in an inverse order. Example: Input Sample: Enter 4-digit number: 5723 Output Sample: Inverse of the number is 3275 Presented by TA. Nada Kamel
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- 26. Any Questions? Presented by TA. Nada Kamel