mirror of
https://github.com/fluencelabs/wasmer
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42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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/*
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* Copyright 2016 The Emscripten Authors. All rights reserved.
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* Emscripten is available under two separate licenses, the MIT license and the
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* University of Illinois/NCSA Open Source License. Both these licenses can be
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* found in the LICENSE file.
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*/
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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struct vec {
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double x, y, z;
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vec() : x(0), y(0), z(0) {};
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vec(const double a, const double b, const double c) : x(a), y(b), z(c) {};
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};
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struct basis {
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vec a, b, c;
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basis(const vec& v) {
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a = v; // should not touch b!
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printf("*%.2f,%.2f,%.2f*\n", b.x, b.y, b.z);
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}
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};
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int main() {
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basis B(vec(1, 0, 0));
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// Part 2: similar problem with memset and memmove
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int x = 1, y = 77, z = 2;
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memset((void*)&x, 0, sizeof(int));
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memset((void*)&z, 0, sizeof(int));
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printf("*%d,%d,%d*\n", x, y, z);
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memcpy((void*)&x, (void*)&z, sizeof(int));
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memcpy((void*)&z, (void*)&x, sizeof(int));
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printf("*%d,%d,%d*\n", x, y, z);
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memmove((void*)&x, (void*)&z, sizeof(int));
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memmove((void*)&z, (void*)&x, sizeof(int));
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printf("*%d,%d,%d*\n", x, y, z);
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return 0;
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}
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