online compiler and debugger for c/c++

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#include <stdio.h> #include <math.h> int isPrime(int num); int isPrime(int num) { if (num<=1) return 0; for (int i=2; i<=sqrt(num); ++i) { if (num % i == 0) return 0; } return 1; } int main() { int num; printf("정수를 입력하세요: "); scanf("%d", &num); if(isPrime(num)){ printf("%d는 소수입니다.\n", num); } else { printf("%d는 소수가 아닙니다.\n", num); } return 0; }

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