开源GIS代码，所用语言:C,编译器gcc.-GIS open source code, the language used : C compiler gcc.

正态分布的图形演示 本题用c语言编写的画图程序要在tc2.0下运行. 其余程序在各种编译器下可以运行,-normal graphic demonstration that the use of language c drawing program to tc2.0 running. The remaining procedures in the various compiler can run under, -Graphic demonstration of normal distributio