/******************************************************************************
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*******************************************************************************/
#include <stdio.h>
#include <string.h>
int main() {
FILE * fp; //open exists file
FILE * fn; //open empty file
char c[1000]; // buffer
char trigger[] = "o'clock"; // the word before which the characters should be added
char name [] = "startFile.txt"; // name of source file
char secondName[] = "newFile.txt"; // name of output file
fp = fopen (name, "r"); // open only for reading
if (fp == NULL) { // testing on exists
printf ( "Error");
getchar ();
return 0;
}
fn = fopen(secondName, "w"); // open empty file for writing
if (fn == NULL) { // testing on create
printf ( "Error");
getchar ();
return 0;
}
while (fgets(c, 1000, fp)) { // scanning all string in the source
char *p = strstr(c, trigger);
if (p) {
// ok we found the trigger - now we need to search backwards
// to find the end and then the start of the word before
while (p>c && p[-1]==' ') p--; // find the end of the word
memmove(p+1, p, c+999 - p); // make a space for the ]
*p = ']';
while (p>c && p[-1]!=' ') p--; // find the start of the word
memmove(p+1, p, c+999 - p); // make a space for the [
*p = '[';
}
fputs(c, fn); // writing charter from buffer "c" to empty file
}
fclose(fp); // closing file
fclose(fn);
return 0;
}
Let's go to the graveyard at night - at twelve o'clock!
