错误：
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/mohammad/NetBeansProjects/CppApplication_1'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/cppapplication_1
make[2]: Entering directory `/home/mohammad/NetBeansProjects/CppApplication_1'
mkdir -p dist/Debug/GNU-Linux-x86
g++ -o dist/Debug/GNU-Linux-x86/cppapplication_1 build/Debug/GNU-Linux-x86/main.o build/Debug/GNU-Linux-x86/newfile.o build/Debug/GNU-Linux-x86/newmain.o
build/Debug/GNU-Linux-x86/newfile.o: In function `main':
/home/mohammad/NetBeansProjects/CppApplication_1/newfile.cpp:5: multiple definition of `main'
build/Debug/GNU-Linux-x86/main.o:/home/mohammad/NetBeansProjects/CppApplication_1/main.cpp:15: first defined here
build/Debug/GNU-Linux-x86/newmain.o: In function `main':
/home/mohammad/NetBeansProjects/CppApplication_1/newmain.c:14: multiple definition of `main'
build/Debug/GNU-Linux-x86/main.o:/home/mohammad/NetBeansProjects/CppApplication_1/main.cpp:15: first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-Linux-x86/cppapplication_1] Error 1
make[2]: Leaving directory `/home/mohammad/NetBeansProjects/CppApplication_1'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/mohammad/NetBeansProjects/CppApplication_1'
make: *** [.build-impl] Error 2
BUILD FAILED(构建失败((退出值2，总时间：168ms(
两个C++源文件有一个主要方法：main.cpp和newfile.cpp
从项目中删除其中一个文件或重命名其中的主方法。