Linux c decomposition prime factor, linux decomposition prime factor

Linux c decomposition prime factor, linux decomposition prime factor

 1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <math.h> 5  6 int main(int argc, char **argv) 7 { 8     unsigned long long data = 0, i = 0, max = 0; 9     10     if (argc < 2)11     {12         printf("argument error\n");13         return -1;14     }15 16     if (strlen(argv[1]) > 19)17     {18         printf("out of range\n");19         return -1;20     }21     22     data = atoll(argv[1]);23 24     if (9223372036854775807ULL == data && ('8' == argv[1][18] || '9' == argv[1][18]))25     {26         printf("out of range\n");27         return -1;28     }29     30     printf("data : %llu\n", data);31     while (1)32     {33         max = sqrt(data);34         for (i = 2; i <= max; i++)35         {36             if (0 == (data % i))37             {38                 data = data / i;39                 printf("%llu * ", i);40                 fflush(stdout);41                 break;42             }43         }44 45         if (i > max)46         {47             printf("%llu", data);48             break;49         }50     }51     printf("\n");52     53     return 0;54 }

The quality factor of the numbers below 2 ^ 64-1 is realized,

An error occurred while compiling the undefined reference to 'sqrt'

Man:-lm is required during compilation.