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  1. #include <stdio.h>
  2.  
  3. void replacemarks(char *dst, const char *src, char c, const char *r) {
  4.     while (1) {
  5.         while (*src && (*src != c)) *dst++ = *src++;
  6.         if (*src == 0) break;
  7.         *dst++ = *src++;
  8.         if (*src == 0) break;
  9.         const char *cc = strchr(src + 1, c);
  10.         if (cc) {
  11.             const char *rr = r;
  12.             while (*rr) *dst++ = *rr++;
  13.             src = cc;
  14.             *dst++ = *src++;
  15.         } else {
  16.             while (*src) *dst++ = *src++;
  17.             break;
  18.         }
  19.     }
  20.     *dst = 0;
  21. }
  22.  
  23. int main(void) {
  24.     char line[100];
  25. 	while (fgets(line, sizeof line, stdin)) {
  26.         char src[100], c, r[100], dst[100];
  27.         sscanf(line, "%s %c%s", src, &c, r);
  28.         replacemarks(dst, src, c, r);
  29.         printf("replacemarks(..., \"%s\", '%c', \"%s\") ==> \"%s\"\n",
  30.               src, c, r, dst);
  31.     }
  32. 	return 0;
  33. }
  34.  
Success #stdin #stdout 0s 4536KB
comments (?)
stdin
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hello_from_here _ 21223
this_is_name _ 000044
abracadabra r foo
one * ----
*one * ----
one* * ----
one*two*three * ----
one*two* * ----
*two*three * ----
*one*two*three* * ----
*one*two*three*four* * ----
*one*two*three*four * ----
one*two*three*four* * ----
*one*two*three*four*five* * ----
*one*two*three*four*five * ----
one*two*three*four*five* * ----
stdout
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replacemarks(..., "hello_from_here", '_', "21223") ==> "hello_21223_here"
replacemarks(..., "this_is_name", '_', "000044") ==> "this_000044_name"
replacemarks(..., "abracadabra", 'r', "foo") ==> "abrfoora"
replacemarks(..., "one", '*', "----") ==> "one"
replacemarks(..., "*one", '*', "----") ==> "*one"
replacemarks(..., "one*", '*', "----") ==> "one*"
replacemarks(..., "one*two*three", '*', "----") ==> "one*----*three"
replacemarks(..., "one*two*", '*', "----") ==> "one*----*"
replacemarks(..., "*two*three", '*', "----") ==> "*----*three"
replacemarks(..., "*one*two*three*", '*', "----") ==> "*----*two*----*"
replacemarks(..., "*one*two*three*four*", '*', "----") ==> "*----*two*----*four*"
replacemarks(..., "*one*two*three*four", '*', "----") ==> "*----*two*----*four"
replacemarks(..., "one*two*three*four*", '*', "----") ==> "one*----*three*----*"
replacemarks(..., "*one*two*three*four*five*", '*', "----") ==> "*----*two*----*four*----*"
replacemarks(..., "*one*two*three*four*five", '*', "----") ==> "*----*two*----*four*five"
replacemarks(..., "one*two*three*four*five*", '*', "----") ==> "one*----*three*----*five*"
https://ideone.com/LhJaaq
string manipulation
language:
C (gcc 8.3)
created:
3 years ago
visibility:
secret

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