Introduction To Computer Science PDF Fall 2024

INTRODUCTION TO COMPUTER SCIENCE 252-0032, 252-0047, 252-0058 Document authors: Manuela Fischer and Felix Friedrich Department of Computer Science, ETH Zurich Fall 2024 1 Integers and Expressions...

INTRODUCTION TO COMPUTER SCIENCE 252-0032, 252-0047, 252-0058 Document authors: Manuela Fischer and Felix Friedrich Department of Computer Science, ETH Zurich Fall 2024 1 Integers and Expressions 30 Section 3 Integers and Expressions In the previous introductory chapter you have learned that a computer program contains statements that can contain expressions. In this section we will have a closer look at the semantics of expressions. As it will turn out, rules of precedence and associativity are unsurprisingly close to what we would expect from a mathematical point of view. Subsection 3.1 Arithmetic Expressions In order to understand the rules for evaluating of mathematical expressions, let us have a look at another example. Code 3.1 comprises a program to convert a number from degrees Celsius to degrees Fahrenheit. 1 // Program: fahrenheit.cpp 2 // Convert temperatures from Celsius to Fahrenheit. 3 #include 4 5 int main() { 6 // Input 7 std::cout > celsius; 10 11 // Computation and output 12 std::cout