pvjc24/cv1/program.c

#include <stdio.h>

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

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    while ((text = getchar()) != EOF) {
        if (text >= 'a' && text <= 'z') {
            text = text - 'a' + 'A';
        } else if (text >= 'A' && text <= 'Z') {
            text = text - 'A' + 'a';
        } else if (text == '\n') {
            lines_count++;
        } else if (text < 32 || text == 127) {
            continue;
        }
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	printf("hello world\n");
	return 1;
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        putchar(text);
    }

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