g5.c - master - Nik135/Homeworks

g5.c

27 строк556 B

Nik135

hw10

21 фев 2026, 21:08

21 фев 2026, 21:08abf0fc4

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

int main()
{
    FILE *fin = fopen("input.txt", "r");
    FILE *fout = fopen("output.txt", "w");
    char str[1001];

    if (!fin || !fout) return 1;

    if (fgets(str, sizeof(str), fin) == NULL) return 1;
    fclose(fin);

    for (int i = 0; str[i]; i++)
    {
        if (str[i] == 'a') str[i] = 'b';
        else if (str[i] == 'b') str[i] = 'a';
        else if (str[i] == 'A') str[i] = 'B';
        else if (str[i] == 'B') str[i] = 'A';
    }

    fprintf(fout, "%s", str);
    fclose(fout);

    return 0;
}