LinuxQuestions.org - c program to generate a string with replaced values in a file.

I am trying to replace a particular character in a string with all the letters read from a file.

for example, i have a replace.txt which contains all the replacing characters like '#' and '&'.
If my string is "array",character 'a' has to be replaced. The program should generate combinations like "#rray","#rr&y","#rr#y","&rr&y","&rr#y","&rray","arr#y" and "arr&y".

Can anyone provide C code to generate these combinaions ?

I have tried once...but i'm getting undesired output.

here is my code,

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int Guess(char str[],char start[],int startPos);
char* replaceChar(char* str, char ch1, char ch2);
void clear(char str[])
{
strcpy(str, "");
}
int size(char str[])
{
//printf("%d\n",strlen(str));
return strlen(str);
}
void append(char str[], char c)
{
int len = strlen(str);
str[len] = c;
str[len+1] = '\0';
}
char* replace(char* str, char *orig, char rep,int k)
{
static char buffer[4096];
char *p;
int i,count;

if(!(p = strstr(str, orig)))
return str;
//printf("size : %ld\n",p-str+(k-2));
strncpy(buffer, str, p-str+(k-2));
buffer[(p-str)+(k-2)+1] = '\0';
//printf("Buffer[%ld] : %c\n",p-str+(k-2),buffer[p-str+(k-2)]);
sprintf(buffer+(p-str)+(k-2), "%c%s", rep, p+strlen(orig)+(k-2));
//printf("res main : %s \n",buffer);
/*for(i=(p-str)+(k-2)+1;i<strlen(buffer);i++)
{
printf("i = %d\n",i);
if(buffer[i]=='a')
{
replace(buffer,"a",rep,i-3);
printf("res : %s \n",buffer);
}
}*/
return buffer;
}
long int findfirst(char s[], char c, int k)
{
int i,flag=0;
char* pch;
pch=strchr(s+k-1,c);
return (pch-s+1);
}

char start[1000];
int main()
{
//freopen("replace.txt","r",stdin);
FILE *fp;
fp=fopen("replace.txt","r");
char line[1000];
int i=0;
while (fgets(line, sizeof(line), fp))
{
start[i] = line[0];
i++;
}
printf("%s",start);
printf("\n");
fclose(fp);
char guess[100];
/*---------------------Read Input by Character-----------------------*/
int c;
while ((c = getchar())!=EOF)
{
if (c=='\n')
{
Guess(guess,start,0);
clear(guess);
}
else
{
char c1=(char)c;
append(guess,c1);
}
}
if (size(guess)!=0)
{
Guess(guess,start,0);
}
return 0;
}

int Guess(char* str,char start[],int startPos)
{
//printf("%s",str);
//printf("%s",start);
//printf("\n");
char* baseString = str;
int match=1;
int i,j;
char* res;
for (i=startPos; i<strlen(str); i++) //go through the rest of the string looking for replacements
{
//printf("%c %d %ld\n",str[i],i,findfirst(str,'a',i));
if ((findfirst(baseString,'a',i)-1)==i) //replacement
{
for (j=0; j<2; j++) //go through all of the replacements
{
res = replace(baseString,"a",start[j],i);
printf(" res : %s \n",res);//c_str(baseString));
Guess(res,start,i+1);
//baseString=*str;
baseString=str;
}
}
}
return 0;
}

when i give input as "samba", i'm getting output as,

"#
samba
res : s"mba
res : s"mba (here i need o/p as s"mb")
res : s"mba (here i need o/p as s"mb#)
res : s#mba
res : s#mba (here i need o/p as s#mb")
res : s#mba (here i need o/p as s#mb#)
res : samb"
res : samb#

can anyone provide a solution to this?
Also how to use char* instead of char[]?