1、
#includeint main(void) { int ch; int rows = 0; while((ch = getchar()) != EOF) { switch(ch) { case '\n': rows++; break; } } printf("number of rows: %d\n", rows); return 0; }
2、
#includeint main(void) { int ch; int rows = 0; while((ch = getchar()) != EOF) { if(ch == '\n') rows++; } printf("number of rows: %d\n", rows); return 0; }
3、
#includeint main(void) { int ch; int rows = 0; while( ch = getchar()) { if(ch == EOF) break; if(ch == '\n') rows++; } printf("number of rows: %d\n", rows); return 0; }