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#include <stdio.h>
int main()
{
printf("hello yichang\n");
int num;
num=0;
int i;
for (i=1;i<=100;i++)
{
num=num+i;
if(num==5050){
printf("%d=%d\n",i,num);}else{
printf("%d+",i);
}
}
printf("1+2+3...+98+99+100 ,total is: 10½øÖÆ:%#d,8½øÖÆ:%#o...“ÎÞǰ׺±íʾ,%d,%o”\nÓÐÃξÍÈ¥×ö±ð¹ÜÌìʲôʱºòÁÁ!!!\n",num,num,num,num); //“#”ºÅÏÔʾCǰ׺
return 0;
}
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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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640K ought to be enough for everybody
— Bill Gates 1981
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