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$ echo "Pastrnak dal proti Floride opet gol." > pasta.in $ gcc string.c $ ./a.out < pasta.in
#include <stdio.h> #include <string.h> #include <stdlib.h> void replace_char (char *dest, char a, char b) { int L = strlen (dest); for (int i = 0; i < L; i++) if (*(dest+i) == a) *(dest+i) = b; } void replace_string (char *dest, char *a, char *b) { int L1 = strlen (dest); int L2 = strlen (a); int i, j; for (i = 0; i < L1 - L2; i++) { for (j = 0; j < L2; j++) { if (*(dest + i + j) != *(a+j)) break; } if (j == L2) memcpy (dest + i, b, L2); } } void switch_caps (char *dest) { char *b = dest; int L = strlen(dest); for (int i = 0; i < L; i++, b++) { if((*b >= 'a' && *b <= 'z') || (*b >= 'A' && *b <= 'Z')) { *b ^= 1 << 5; } } } int main (void) { char *a = malloc (100); scanf ("%[^\n]", a); printf ("%s\n", a); replace_char (a, 'o', 'x'); printf ("%s\n", a); replace_string (a, "xpet", "XXXX"); printf ("%s\n", a); switch_caps (a); printf ("%s\n", a); return 0; }