Atmosphere (unit) for the purposes of specifying the physical properties of substances, “"standard pressure"” should be precisely . A pressure of 1 atm can also be stated as: Scuba divers and others use the word "atmosphere" and "atm" in relation to pressures that are relative to mean atmospheric pressure at sea level (1.013 bar). For example, a partial pressure of oxygen is calibrated typically using air at sea level, so is expressed in units of atm. The old European unit technical atmosphere (at) is equal to 1 kilogram-force per square centimetre (kgf/cm), Pa. Atmosphere (unit) The standard atmosphere (symbol: atm) is a
Single Compilation Unit For example, if you have the source files foo.cpp and bar.cpp, they can be placed in a Single Compilation Unit as follows: Suppose foo.cpp and bar.cpp are: //foo.cpp int main() // Definition of function 'main' //bar.cpp void bar() // Definition of function 'bar' Now the standard header file (iostream) is compiled only once, and function bar may be inlined into function main, despite being from another module. Single Compilation Unit Single Compilation Unit (SCU) is a computer programming technique for the C and C++ languages, which reduces serial compilation time and allows the compiler to perform certain program optimizations even