| // A simple program that builds a sqrt table |
| #include <stdio.h> |
| #include <math.h> |
| |
| int main (int argc, char *argv[]) |
| { |
| int i; |
| double result; |
| |
| // make sure we have enough arguments |
| if (argc < 2) |
| { |
| return 1; |
| } |
| |
| // open the output file |
| FILE *fout = fopen(argv[1],"w"); |
| if (!fout) |
| { |
| return 1; |
| } |
| |
| // crate a source file with a table of square roots |
| fprintf(fout,"double sqrtTable[] = {\n"); |
| for (i = 0; i < 10; ++i) |
| { |
| result = sqrt(static_cast<double>(i)); |
| fprintf(fout,"%g,\n",result); |
| } |
| |
| // close the table with a zero |
| fprintf(fout,"0};\n"); |
| fclose(fout); |
| return 0; |
| } |