| // A simple program that builds a sqrt table |
| #include <math.h> |
| #include <stdio.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; |
| } |
| |
| // create 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; |
| } |