long long int absValue = llabs(num); printf("The absolute value of %lld is %lld ", num, absValue); return 0; } 输出结果:The absolute value of -5000000000 is 5000000000 5. 双扩展精度浮点数绝对值函数 fabsl() 函数原型:long double fabsl(long double x); 功能:计算双扩展精度浮点数x的绝...