Although std::cout in C++ is powerful, it lacks the ease of use of format
string in Python. Fortunately, the 3rd party package fmt
provides a similar feature for C++.
To use the fmt package, we need to build it:
git clone --depth 1 https://github.com/fmtlib/fmt.git
cd fmt
mkdir build && cd build
cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=~/tools/fmt -DCMAKE_BUILD_TYPE=Release ..
make -j 8
make installThis will build the static version of fmt and install it under
$HOME/tools/fmt.
To build a dynamic library, use the following cmake command instead:
cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=~/tools/fmt -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=TRUE ..Here is a short snippet to test it:
#include <iostream>
#include <vector>
#include <fmt/ranges.h>
#include <fmt/core.h>
using std::vector;
int main() {
vector<int> arr = {1, 2, 3};
fmt::print("arr is {}", arr);
fmt::print("The price of {} is {} Yuan/kg", "apple", 4.2);
return 0;
}Use the following comamnd to build against the static version of fmt:
g++ -L$HOME/tools/fmt/lib64/ -I$HOME/tools/fmt/include/ test.cc -l:libfmt.a -o test_staticAnd the following command to build against the dynamic version of fmt:
g++ -L$HOME/tools/fmt/lib64/ -I$HOME/tools/fmt/include/ test.cc -lfmt -o test_sharedTo run the dynamic executable, you need to set up the env variable
LD_LIBRARY_PATH properly:
LD_LIBRARY_PATH=$HOME/tools/fmt/lib64:$LD_LIBRARY_PATH ./test_sharedThe size differs significantly between the static and dynamic executable files:
32K test_shared
220K test_static此内容由惯性聚合(RSS阅读器)自动聚合整理，仅供阅读参考。 原文来自 — 版权归原作者所有。