pvjc24/cv1/program.c

#include <stdio.h>

int main() {
    int text;
    int lines_count = 0;

    while ((text = getchar()) != EOF) {
        if (text == '\n') {
            putchar('\n');
            lines_count++;
        } else if (text == '\t') {
            putchar('\t');
            continue;
        } else if (text >= 'a' && text <= 'z') {
            putchar(text - 'a' + 'A');
        } else if (text >= 'A' && text <= 'Z') {
            putchar(text - 'A' + 'a');
        } else if (text < 32 || text == 127) {
            continue;
        } else {
            putchar(text);
        }
    }

    printf("\nLines count: %d\n", lines_count);
    return 0;
}