二重积分 Guass—L高精度求积计算，精度高，速度快-double integral Guass-L for the calculation of high-precision, high accuracy and speed

数值分析中，使用guass列主元素消去法计算的程序

Numerical integration using guass and simpsons method. Also includes a example code which uses the above to calculate carbon diffusion in steel over time at various temperatures