Standard library functions. The standard library functions are built-in functions in C programming to handle tasks such as mathematical computations, I/O processing, string handling etc. These functions are defined in the header file. When you include the header file, these functions are available for use.
Knee replacement. Knee replacement, also known as knee arthroplasty, is a surgical procedure to replace the weight-bearing surfaces of the knee joint to relieve pain and disability. It is most commonly performed for osteoarthritis,[1] and also for other knee diseases such as rheumatoid arthritis and psoriatic arthritis.
As cartilage wears and bone rubs against bone, pain and reduced mobility follow. Knee replacement surgery is a common solution that provides dramatic pain relief for more than 90 percent of patients. The vast majority of knee replacement procedures are used to treat osteoarthritis. The procedureâintroduced in 1968ârelies on a mechanical implant to replace severely arthritic or damaged knee joints.