C/C++ ÓëÔËËãºÍ»òÔËËãת»»´óСд
// & Óë,½«Ö¸¶¨Î»ÖÃÉèÖÃΪ0 | »ò,½«Ö¸¶¨Î»ÖÃÉèÖÃΪ1
//×¢: Ö»Õë¶Ô´¿×ÖĸµÄÇé¿ö
#include <stdio.h>
#include <string>
int main()
{
char str[6] = "xxing";
std::string str1 = "INGXX";
for(int i = 0; i < 5; i++)
{
str[i] &= 0xdf;// ת´óд 1101 1111
str1[i] |= 0x20;// תСд 0010 0000
}
printf("xxing:%s\nINGXX:%s\n", str, str1.c_str());
return 0;
}
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1. Ê×ÏÈÏÂÔØEclipse for C++, ×îаæÊÇ»ùÓÚEclipse 3.5.2µÄ,eclipse-cpp-galileo-SR2-win32.zip
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C/C++ optimizing compilers are great--but there *are* a few techniques for hand-tuning your code to run as efficiently as possible on the AMD Athlon64 and Opteron processors, especially when developing DLLs, device drivers, or other performance-bound pieces of code.
Alan Zeichick
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