Compilare: main.c: In function 'main': main.c:24:35: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while(text[i] != '\0' && (text[i] >= 'a' && text[i] <= 'z') || (text[i] >= 'A' && text[i] <= 'Z')) { ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:14:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(text, 200000, in); ^~~~~~~~~~~~~~~~~~~~~~~