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//ÒÔϳÌÐòÊÇʵÏÖСдת´óд³ÌÐò
#include<stdio.h>
void to_upper(char *str)
{
for(;*str !='\0';str++)
{
if(unsigned(*str-'a')<='z'-'a')
*str-='a'-'A';//Сдת³É´óд
}
}
void main()
{
char *str="Are you ready?";
to_upper(str);
printf("%s\n",str);
}
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char *str="Are you ready?";¶ÔÓ¦µÄ»ã±à
004010A8 mov dword ptr [ebp-4],offset string "Are you ready?" (00422020)
¸ÄÕýΪ£º
#include<stdio.h>
void to_upper(char *str)
{
for(;*str !='\0';str++)
{
if(unsigned(*str-'a')<='z'-'a')
*str-='a'-'A';//Сдת³É´óд
}
}
void main()
{
char str[]="Are you ready?";
to_upper(str);
printf("%s\n",str);
}
Êä³ö£ºARE YOU READY£¿
char str[]="Are you ready?"¶ÔÓ¦µÄ»ã±à£º
004010A8 mov eax,[string "Are you ready?" (00422020)]
004010AD mov dword ptr [ebp-10h],eax
004010B0 mov ecx,dword ptr [string "Are you ready?"+4 (00422024)]
004010B6 mov dword ptr [ebp-0Ch],ecx
004010B9 mov edx,dword ptr [string "Are you ready?"+8 (00422028)]
004010BF mov dword ptr [ebp-8],edx
004010C2 
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Thanks for your interest in C programming.
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list of interesting C p ......
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#include <stdio.h>
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