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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
int main(void)
{
char input[256] = "\0";
char output[300] = "\0";
char *pt = output;
char *p;
FILE *fin,*fout;
fin = fopen("src.dat","rb"); //要读取内容的文件名
fout = fopen("dst.dat","wb"); //写入新文件
if(fin == NULL || fout == NULL)
{
exit(1);
}
while(!feof(fin))
{
input[0] = '\0';
output[0] = '\0';
fread(input,254,1,fin);
p = strtok(input, "'");
while( p != NULL )
{
strcat(output,p);
pt = output;
while( *pt++ != '\0');
{
pt--;
*pt++ = '\'';
*pt++ = '\'';
*pt = '\0';
//puts(output);
}
p = strtok(NULL, "'");
}
pt = pt-2;
*pt = '\0';
puts(output);
fflush(stdin);
if(fwrite(output,strlen(output),1,fout) == 0)//判断是否写入失败
getch();
}
fclose(fin);
fclose(fout);
return 0;
}
//////////////////////////////////////////
//result:
\ \n\r
$.\'' \",#(7),01444\''9=82<.342踈0?郳0JFIF\0\0\0\0\0\
00*Intel(R) JPEG Library, version 1,5,4,36\0踈0CC
\r\r2!!22222222222222222222222222222222222222222222222222?0\0\
0\0\0\0\0\0\0\0 \n
\0\0\0}\0!1AQa\"q2亼?#B绷R佯$3br?\n\%&\''()*456789:
CDEFGHIJSTUVWXYZcdefghijstuvwxyz儎厗噲墛挀敃枟槞殺¥ウЖ┆渤吹斗腹郝媚牌侨墒矣哉
肿刭卺忏溴骁栝犟蝮趱鲼?\0\0\0\0\0\0\0 \n
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:CDEFGHIJSTUVWXYZcdefghijstuvwxyz們剠唶垑姃摂晼棙櫄ⅲぅΗī炒刀犯购旅呐魄壬室釉
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/////////////////////////////////////////////
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#include "stdio.h"
#include "string.h"
main()
{
char p[]="good'jlf'fkjd'dfd'34'fd";
for(int i=0;i<strlen(p);i++)
{
if(p[i]==39)
p[i]='"';// 简单的例子。如果数据很大而且‘的分布都很离散的话也这能遍历了
}
printf("%s\n",p);
}
#include <string.h>
#include <stdio.h>
int main(void)
{
char input[50] = "abc'daasdf'asfsdafasdf'asd!";
char output[60] = "\0";
char *pt = output;
char *p;
p = strtok(input, "'");
while( p != NULL )
{
strcat(output,p);
pt = output;
while( *pt++ != '\0');
{
pt--;
*pt++ = '\'';
*pt++ = '\'';
*pt = '\0';
//puts(output);
}
p = strtok(NULL, "'");
}
pt = pt-2;
*pt = '\0';
puts(output);
return 0;
}
//result:
abc''daasdf''asfsdafasdf''asd!
Press any key to continue
#include "stdio.h"
#include "string.h"
void Insert(char *p,int size,int pos)
{
for(int i=size;i>pos;i--)
{
p[i+1]=p[i];
}
p[i+1]=39;
}
main()
{
char p[255]="good'jlf'fkjd'dfd'34'fd"; //变成双引号 后还能保证该 字符数组还有空间!
int size=strlen(p)+1;
printf("%s\n",p);
for(int i=0;i<size;i++)
{
if(p[i]==39)
{
Insert(p,size,i);
size++;
i+=2;
}
}
printf("%s\n",p);
}
// 一个单引号改成 2个不就是再次插入单引号吗?
string.replace
// replacing in a string
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string base="this is a test string.";
string str2="n example";
string str3="sample phrase";
string str4="useful.";
// function versions used in the same order as described above:
// Using positions: 0123456789*123456789*12345
string str=base; // "this is a test string."
str.replace(9,5,str2); // "this is an example string."
str.replace(19,6,str3,7,6); // "this is an example phrase."
str.replace(8,10,"just all",6); // "this is just a phrase."
str.replace(8,6,"a short"); // "this is a short phrase."
str.replace(22,1,3,'!'); // "this is a short phrase!!!"
// Using iterators: 0123456789*123456789*
string::iterator it = str.begin(); // ^
str.replace(it,str.end()-3,str3); // "sample phrase!!!"
str.replace(it,it+6,"replace it",7); // "replace phrase!!!"
it+=8; // ^
str.replace(it,it+6,"is cool"); // "replace is cool!!!"
str.replace(it+4,str.end()-4,4,'o'); // "replace is cooool!!!"
it+=3; // ^
str.replace(it,str.end(),str4.begin(),str4.end());
// "replace is useful."
cout << str << endl;
return 0;
}
Output:
replace is useful.
/*
因为
char *p="good'jlf'fkjd'dfd'34'fd";// p 指向的常量区,也就是字符串="good'jlf'fkjd'dfd'34'fd”是不可以改变的。
如果你真的想要定义修改的字符串 就定义:
char p[]="good'jlf'fkjd'dfd'34'fd";
这样修改吧!
*/
char *p="good'jlf'fkjd'dfd'34'fd";// 是这样的吗?这样的char *p吗?如果是的, 你放弃吧!