56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package main
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/*
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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*/
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import "C"
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import (
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"fmt"
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"unsafe"
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)
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func main() {
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// C.CString example
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cstr := C.CString("Hello, World!")
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C.puts(cstr)
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// C.CBytes example
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bytes := []byte{65, 66, 67, 68} // ABCD
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cbytes := C.CBytes(bytes)
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// C.GoString example
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gostr := C.GoString(cstr)
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println("Converted back to Go string: ", gostr)
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// C.GoStringN example (with length limit)
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gostringN := C.GoStringN(cstr, 5) // only take first 5 characters
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println("Length-limited string: ", gostringN)
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// C.GoBytes example
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gobytes := C.GoBytes(cbytes, 4) // 4 is the length
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println("Converted back to Go byte slice: ", gobytes)
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// C math library examples
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x := 2.0
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// Calculate square root
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sqrtResult := C.sqrt(C.double(x))
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fmt.Printf("sqrt(%v) = %v\n", x, float64(sqrtResult))
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// Calculate sine
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sinResult := C.sin(C.double(x))
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fmt.Printf("sin(%v) = %v\n", x, float64(sinResult))
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// Calculate cosine
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cosResult := C.cos(C.double(x))
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fmt.Printf("cos(%v) = %v\n", x, float64(cosResult))
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// Calculate natural logarithm
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logResult := C.log(C.double(x))
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fmt.Printf("log(%v) = %v\n", x, float64(logResult))
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C.free(unsafe.Pointer(cstr))
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C.free(cbytes)
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}
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