upper 50 examples/validchars/validchr.c unsigned char map[256], upper[256], lower[256]; upper 62 examples/validchars/validchr.c upper[i] = 0; upper 84 examples/validchars/validchr.c upper[c]++; upper 108 examples/validchars/validchr.c if (!upper[i]) upper 117 examples/validchars/validchr.c if (upper[i])