117 lines
2.1 KiB
C++
117 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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#include <xizi.h>
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#include <stdio.h>
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#include <cstdlib>
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using namespace std;
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extern "C" void KPrintf(const char *fmt, ...);
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class Animal //parent class
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{
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public:
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virtual void Eat()
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{
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KPrintf("eat\n");
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}
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void Sleep()
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{
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KPrintf("sleep\n");
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}
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};
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class Fish :public Animal //subclass
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{
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public:
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void Eat()
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{
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KPrintf("fish eat\n");
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}
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};
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void Doeat(Animal& animal)
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{
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animal.Eat();
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}
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void MemTest2()
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{
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int i;
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char *ptr = NULL; /* memory pointer */
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for (i = 0; ; i++) {
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/* allocate (1<<i) bytes memory every single time */
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ptr = (char *)operator new(1 << i);
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/* if allocate successfully */
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if (ptr != NULL) {
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KPrintf("get memory :%d byte\n", (1 << i));
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/* release the memory */
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operator delete(ptr);
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KPrintf("free memory :%d byte\n", (1 << i));
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ptr = NULL;
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} else {
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KPrintf("try to get %d byte memory failed!\n", (1 << i));
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break;
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//return 0;
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}
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}
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}
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void OverLoadTest(int a)
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{
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KPrintf("output is a int number: %d\n", a);
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}
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void OverLoadTestDouble(int a,int b )
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{
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KPrintf("output is 2 int number: %d and %d\n", a,b);
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}
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template<typename T>
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void MySwap(T& a, T& b)
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{
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T temp = a;
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a = b;
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b = temp;
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}
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extern "C" int cppmain(void)
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{
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MemTest2();
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class Fish fish;
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Doeat(fish);
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int a = 3;
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int b = 5;
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void OverLoadTestDouble(int a, int b);
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OverLoadTestDouble(a, b);
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MySwap(a,b);
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KPrintf("with template the output is: %d and %d\n", a,b);
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return 0;
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}
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