pvjc24/cv1/program.c

#include <stdio.h>

int main() {
    int c;
    int lineCount = 0;

    while ((c = getchar()) != EOF) {
        if (c >= 'a' && c <= 'z') {
            c = c - 'a' + 'A';
        } else if (c >= 'A' && c <= 'Z') {
            c = c - 'A' + 'a';
        }

        if (c == '\n') {
            lineCount++;
        }
	
        
        putchar(c);
    }

    
    printf("\nLines␣count: %d\n",lineCount);

    return -1;
}