Pascal (unit) dB SPL, or 20 µPa. The airtightness of buildings is measured at 50 Pa. The units of atmospheric pressure commonly used in meteorology were formerly the bar, which was close to the average air pressure on Earth, and the millibar. Since the introduction of SI units, meteorologists generally measure pressures in hectopascals (hPa) unit, equal to 100 pascals or 1 millibar. Exceptions include Canada, which use kilopascals (kPa). In many other fields of science, the SI is preferred, which means Pa with a prefix (in multiples of 1000) is preferred. Many countries also use the millibars. In practically all other
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