简单加密解密
void encrypt(char *password) { int x = strlen(password); char t[strlen(password)]; strcpy(t, password); int i; for(i=0; i<strlen(password); i++) { char cur = t[i]; if(isalpha(cur)) { t[i] = cur +1; } } printf("%s\n",t); for(i=0; i<strlen(password); i++) { char c = t[i]; if(isalpha(c)) { t[i] = c - 1; } } printf("the decrypted message is: %s\n", t); } int main() { char msg[] = "root"; printf("%s\n", msg); encrypt(msg); }