과제중인데 scanf가 입력을 안받음.. 왜 그런거임?? #include #include #define _CRT_SECURE_NO_WARNINGS int main(void) { int n; int x; while (1) { char opt; printf("Enter an interger:"); scanf("%d", &n); printf("\n"); x = sqrt(n); if (x*x == n) { printf("Next square number: %d\n", (x+1)*(x+1)); } else { printf("%d is not a square number.\n", n); } printf("Enter c/C for continue or q/Q for quit: "); scanf("%c", &opt); // 얘가 입력을 못받음 ㅜㅜㅜㅜ switch (opt) { case 'c': case 'C': break; case 'q': case 'Q': printf("Bye! \n"); return 0; } } }