【c语言】求绝对值

//  求绝对值#include <stdio.h>int fabs(int a)
{if (a < 0){a =  ~a + 1;}return a;
}int main()
{printf("绝对值是：%d\n", fabs(5));printf("绝对值是：%d\n", fabs(0));printf("绝对值是：%d\n", fabs(-1));return 0;
}