Fix segmentation fault in calc sample
Segmentation fault occurred in `calc` sample
when no variables are given from command line argument:
```
$ cd sample
$ make calc64
$ ./calc64 "" "123"
varTbl = { }
64bit mode
zsh: segmentation fault ./calc64 "" "123"
```
`put` function always access `x[0]`,
but segmentation fault occurred when `x.size() == 0`.
diff --git a/sample/calc.cpp b/sample/calc.cpp
index 3f4a0f9..29ad9c3 100644
--- a/sample/calc.cpp
+++ b/sample/calc.cpp
@@ -155,9 +155,9 @@
void put(const std::vector<double>& x)
{
- printf("%f", x[0]);
- for (size_t i = 1, n = x.size(); i < n; i++) {
- printf(", %f", x[i]);
+ for (size_t i = 0, n = x.size(); i < n; i++) {
+ if (i > 0) printf(", ");
+ printf("%f", x[i]);
}
}
