main

问题 I was trying to compile a program with cmake , and I ended up deleting my main.cpp file, which I had just compounded into another file which held the name of my project (i.e., I just cut and pasted the main function into that one). The problem is that I got a main.cpp not found error, and wasn't sure whether or not in C++ a file known as main.cpp is required, or can I have a file with a different title which contains the function main instead? Edit I should note that I have removed any

问题 I was trying to compile a program with cmake , and I ended up deleting my main.cpp file, which I had just compounded into another file which held the name of my project (i.e., I just cut and pasted the main function into that one). The problem is that I got a main.cpp not found error, and wasn't sure whether or not in C++ a file known as main.cpp is required, or can I have a file with a different title which contains the function main instead? Edit I should note that I have removed any

问题 I came across a weird static library which contains a main() function (C++). I just wonder what the purpose it is. How does the main() execute? 回答1: From the linker perspective, it doesn't matter where the main function is - it can be in a static library as well as in standalone object file, linker couldn't care less. It produces the executable from object files, no matter where they come from, and in the final executable all the distinction between library/non library symbols is lost. As for

问题 I came across a weird static library which contains a main() function (C++). I just wonder what the purpose it is. How does the main() execute? 回答1: From the linker perspective, it doesn't matter where the main function is - it can be in a static library as well as in standalone object file, linker couldn't care less. It produces the executable from object files, no matter where they come from, and in the final executable all the distinction between library/non library symbols is lost. As for

问题 a want to plot some graphs from for loop, where the main should be half italic and half normal. The code example should be a1<-1:20 a2<-sample(a1) b1<-sample(a1) b2<-sample(a1) a<-list(a1, a2) b<-list(b1, b2) v<-c("a", "b") for(i in 1:2){ jpeg(file=sprintf("%s.jpg", v[i])) plot(a[[i]], b[[i]], main=c("sas", v[i])) dev.off()} but the v[i] should be in italic. I tried plot(a[[i]], b[[i]], main=c("sas", expression(italic(v[i])))) but the second line of main is missing. Thx for any ideas! 回答1:

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . Improve this question As a beginner I wonder why my caller.VelocityC only works when put inside of the main block? When i have my code like this, I can't call the method. Method calling class: public class Velocity2 { VelocityCounter caller = new VelocityCounter(); caller

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . Improve this question As a beginner I wonder why my caller.VelocityC only works when put inside of the main block? When i have my code like this, I can't call the method. Method calling class: public class Velocity2 { VelocityCounter caller = new VelocityCounter(); caller

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . Improve this question As a beginner I wonder why my caller.VelocityC only works when put inside of the main block? When i have my code like this, I can't call the method. Method calling class: public class Velocity2 { VelocityCounter caller = new VelocityCounter(); caller

问题 C++ compiler often mangle function names to support many features. Programer can suppress default name-mangling using extern "C" way. However, why int main(int, char **) not affected ever? // test.cpp int max(int a, int b) { return a > b ? a : b; } extern "C" { int min(int a, int b) { return a < b ? a : b; } } int main (int argc, char *argv[]) { return 0; } And $ xcrun --sdk macosx clang -x c++ -c test.cpp -o test $ xcrun nm -nm test 0000000000000000 (__TEXT,__text) external __Z3maxii

问题 C++ compiler often mangle function names to support many features. Programer can suppress default name-mangling using extern "C" way. However, why int main(int, char **) not affected ever? // test.cpp int max(int a, int b) { return a > b ? a : b; } extern "C" { int min(int a, int b) { return a < b ? a : b; } } int main (int argc, char *argv[]) { return 0; } And $ xcrun --sdk macosx clang -x c++ -c test.cpp -o test $ xcrun nm -nm test 0000000000000000 (__TEXT,__text) external __Z3maxii