首先，在

.cpp

所在的文件夾下建立

A.txt

與

B.txt

。向其中輸入字母。

#include

#include

#include

int?main()

{

FILE?*a,*b,*c;

char?ch[100],outfile[10];

int?i=0,n;

void?paixu(char?a[100],int?n);

if((a=fopen("A.txt","r"))==NULL)

{

printf("Can't?open?the?file?'A.txt'");

exit(0);

}

if((b=fopen("B.txt","r"))==NULL)

{

printf("Can't?open?the?file?'B.txt'");

exit(0);

}

printf("

請輸入輸出的文件名：

");

scanf("%s",outfile);

if((c=fopen(outfile,"w"))==NULL)

{

printf("Can't?open?the?file?%s",outfile);

exit(0);

}

while(!feof(a))

ch[i++]=fgetc(a);

while(!feof(b))

ch[i++]=fgetc(b);

n=strlen(ch);

paixu(ch,n);

for(i=0;i

fputc(ch[i],c);

fclose(a);

fclose(b);

fclose(c);

return?0;

}

void?paixu(char?a[100],int?n)

{

int?i,j;

char?temp;