C语言多重嵌套if C语言else if 实例 C语言逻辑运算符实例 C语言多重嵌套if // divisors.c -- nested ifs display divisors of a number #include <stdio.h> #include <stdbool.h> int main(void) { unsigned long num; // number to be checked unsigned long div; // potential divisors bool isPrime; // prime flag printf("Please enter an integer for analysis; "); printf("Enter q to quit.\n"); while (scanf("%lu", &num) == 1) { for (div = 2, isPrime = true; (div * div) <= num; div++) { if (num % div == 0) { if ((div * div) != num) printf("%lu is divisible by %lu and %lu.\n", num, div, num / div); else printf("%lu is divisible by %lu.\n", num, div); isPrime= false; // number is not prime } } if (isPrime) printf("%lu is prime.\n", num); printf("Please enter another integer for analysis; "); printf("Enter q to quit.\n"); } printf("Bye.\n"); return 0; } C语言else if 实例 C语言逻辑运算符实例