本文主要是介绍趋势科技实习--3个tool的实现，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
三个tool的效果展示：
Cpu100.exe（中间的是CPU显示）
AllocMemory.exe（这里是在windows下，mac系统下的效果还不是很明显，我继续完善）
AllocMemory.exe所占内存一直在增加
NewFile.exe
输入NewFile c 1024
会生成文件c，size为1KB
附上代码：
cpu100.cpp
#include<stdio.h>
int main()
{while (1){}
}
AllocMemory.cpp
#include <stdlib.h>
#include <stdio.h>size_t A_MEGABYTE;int main()
{char *some_memory = NULL;int i = 0;while (i<20){scanf("%ld", &A_MEGABYTE);size_t size_to_allocate;size_to_allocate = A_MEGABYTE;some_memory = (char*)malloc(size_to_allocate);//printf("%s\n",&some_memory);i++;}system("pause");return 0;
} NewFile.cpp
// NewFile.cpp : 定义控制台应用程序的入口点。
//
#include <stdio.h>
#include <fstream>
#include <iostream>
#include <string>
#include <stdlib.h>
using namespace std;/*long long GetFreeSpaceSize()
{
long long nFreeSize = 0;
ULARGE_INTEGER FreeBytesAvailable;
ULARGE_INTEGER TotalNumberOfBytes;
ULARGE_INTEGER TotalNumberOfFreeBytes;char szPath[MAX_PATH] = {0};
GetModuleFileName(GetModuleHandle(NULL), szPath, MAX_PATH);
char* p = strstr(szPath,":\\");
*(p+2)='\0';GetDiskFreeSpaceEx(szPath,&FreeBytesAvailable,&TotalNumberOfBytes,&TotalNumberOfFreeBytes);
nFreeSize = TotalNumberOfFreeBytes.HighPart;
nFreeSize = nFreeSize<<(4*8)+TotalNumberOfFreeBytes.LowPart;cout<<szPath<<" , "<<nFreeSize<<endl;
return nFreeSize;
}
*/bool NewFile(string strFileName, long long nFileSize)
{cout << "FileName:" << strFileName << " , FileSize:" << nFileSize << "B" << endl;//windows下可以使用GetFreeSpaceSize得到最大的剩余空间//long long nFreeSize = GetFreeSpaceSize();long long nFreeSize = 102400;if (nFileSize>nFreeSize){cout << "Error : nFileSize>nFreeSize" << endl;return 0;}ofstream outfile(strFileName.c_str());if (!outfile){cout << "can not open!" << endl;exit(0);}char ch = 'A';for (long long i = 0; i<nFileSize; i++){outfile << ch;}outfile.close();return true;
}void Usage()
{cout << "Usage : NewFile.exe filename filesize(B)" << endl;
}int main(int argc, char* argv[])
{Usage();NewFile(argv[1], atoi(argv[2]));//NewFile("a",10);return 0;
}
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