Compilare: user.c: In function ‘main’: user.c:38:88: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if((len-i)%3 == 0 || ((len-i)%3 == 1 && numar[i-1]!='1') || (len-i)%3 == 2 && numar[i]!='1'){ ^ user.c:40:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if((len-i)%3 == 0 && (numar[i]=='1' || numar[i]=='2')|| !i && len==4) ^ user.c:60:26: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(len-i > 3 && (len-i)%3==1 || ok){ ^ user.c:8:16: warning: unused variable ‘zerouri’ [-Wunused-variable] int i, len, T, zerouri=0, ok; ^ user.c:6:15: warning: variable ‘file2’ set but not used [-Wunused-but-set-variable] FILE *file1, *file2; ^ user.c:19:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &T); ^ user.c:24:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%s", numar); ^