Take a look at this code that allows a user to write data to a txt file. #include <stdio.h> int main(void) { FILE *cfPtr = NULL; if ( (cfPtr = fopen("clients.txt","w")) == NULL ){ puts("File could not be opened"); }else{…
my test.c program is: #include <stdio.h> #define VAR(int) int int main() { VAR(int)a = 0; printf("a:%dn", a); } I expected to get a compile error, as the macro "VAR(int)a" should be extended to "inta". In fact the program compiled and…
I am following the tutorial listed here on Protobuf's website. I copied the sample addressbook.proto and compiled it using the line protoc --cpp_out=. addressbook.proto Which produced addressbook.pb.cc and addressbook.pb.h. Here is my program, which doesn't do anything right now (I…
On an Ubuntu 24.04, using the default GCC-13.2 compiler I compiled a source file with -fPIC option to produce relocatable binary: /usr/bin/c++ -v -DBPFTIME_BUILD_WITH_LIBBPF=1 -DSPDLOG_COMPILED_LIB -Dbpftime_text_segment_transformer_EXPORTS -I/home/ahmad/Programs/bpftime/build/build/FridaGum-prefix/src/FridaGum -I/home/ahmad/Programs/bpftime/third_party/spdlog/include -fno-omit-frame-pointer -O3 -DNDEBUG -std=gnu++20 -fPIC -o text_segment_transformer.cpp.o -c /home/ahmad/Programs/bpftime/attach/text_segment_transformer/text_segment_transformer.cpp The compiler output…
I'm not programming very often; I may have skipped something important but... I expect the following code to write 31st October between 30th October and the 1st November. My output skips the 31st. Is it a bug? Do I misuse…
I read about C programming language in Yashwant Kanetkar's book Let us C. In Functions chapter I read about sin, cos, tan and pow functions of math.h file. But in this chapter it is written that: You can even open…
I stumbled upon a failing unit-test, that involves converting doubles to integers. The actual number that is converted is 1.234 * 1000., and the code basically boils down to: #include <iostream> #include <cstdint> int64_t deltatime(double numSeconds) { return (int64_t) (numSeconds…
I am trying to install gcc13 and g++13 in the following Rust docker image. # Builder FROM rust:1-bookworm AS builder RUN apt update RUN apt install software-properties-common -y RUN apt-get install python3-launchpadlib -y RUN add-apt-repository ppa:ubuntu-toolchain-r/test -y RUN apt update…
The following method functions fine but I am curious as to performance and optimization. Example I call 'Output(str)' to send something to the terminal. I added a method that only outputs if debugging, as follows. Now I am left wondering…
Environnment: gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.2)) The conditions under which this occurs are: The printed variable is of float type. There are type conversion errors in the printf. The buffer is refreshed before the printf call. Build command: gcc floatTest.c…