Cpi is a tiny interpreter for C++11 code.
- Qt qmake build system
- Compiler - GNU C++ compiler or LLVM C++ compiler
$ qmake
$ make
$ sudo make installSave C++ source code as hello.cpp.
#include <iostream>
int main()
{
std::cout << "Hello world\n";
return 0;
}Run cpi in command line.
$ cpi hello.cpp
Hello worldImmediately compiled and executed! Almost a script language, but the source file is also C++ program which a compiler can compile successfully.
Next code outputs a square root of input argument.
Specify options for compiler or linker with "CompileOptions: " word. In this example, linking math library specified by "-lm" option.
#include <iostream>
#include <cmath>
#include <cstdlib>
using namespace std;
int main(int argc, char *argv[])
{
if (argc != 2) return 0;
cout << sqrt(atoi(argv[1])) << endl;
return 0;
}
// CompileOptions: -lm $ cpi sqrt.cpp 2
1.41421
$ cpi sqrt.cpp 3
1.7320Adding a shebang, save as hello.cpps. No longer compiled in a C++ compiler successfully.
#!/usr/bin/env cpi
#include <iostream>
int main()
{
std::cout << "Hello world\n";
return 0;
} $ chmod +x hello.cpps
$ ./hello.cpps
Hello worldYes, a shell script. I named it CppScript.
$ cpi
Cpi 2.0.0
Type ".help" for more information.
Loaded INI file: /home/foo/.config/cpi/cpi.conf
cpi> 3 << 23; (Bitwise operation)
25165824
cpi> int a = 3;
cpi> ~a; (Complement)
-4
cpi> a ^ 2; (XOR)
1
cpi> auto func = [](int n) { return n*n; }; (Lambda function)
cpi> func(3);
9
cpi> .quit ( or press ctrl+c )
cpi> .help
.conf Display the current values for various settings.
.help Display this help.
.rm LINENO Remove the code of the specified line number.
.show Show the current source code.
.quit Exit this program.
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