s[0] = '\0';
}
-GString::GString(char *s1) {
+GString::GString(const char *s1) {
int n = strlen(s1);
s = NULL;
memcpy(s, s1, n + 1);
}
-GString::GString(char *s1, int length1) {
+GString::GString(const char *s1, int length1) {
s = NULL;
resize(length = length1);
memcpy(s, s1, length * sizeof(char));