30 lines
603 B
C
30 lines
603 B
C
#include <stdio.h>
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#include <ctype.h>
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int main() {
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int c;
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char output;
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int count_line = 0;
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while ((c = getchar()) != EOF) {
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if (islower(c)) {
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output = toupper(c);
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}
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else if (isupper(c)) {
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output = tolower(c);
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}
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else if (isgraph(c) || c == ' ') {
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output = c;
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}
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else {
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output = c;
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}
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putchar(output);
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if (c == '\n') {
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count_line++;
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}
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}
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// printf("Number of lines: %d\n", count_line);
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return 0;
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}
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