Mein C sagt:
1 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\t.c: In function 'test':
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2 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\t.c:13:5: warning: implicit declaration of function 'nop' [-Wimplicit-function-declaration]
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3 |
13 | nop();
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4 |
| ^~~
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5 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\t.c: In function 'main':
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6 |
t.c:18:12: error: unknown type name 'I2C_STATUS_CODE_t'
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7 |
18 | volatile I2C_STATUS_CODE_t status;
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8 |
| ^~~~~~~~~~~~~~~~~
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9 |
t.c:19:12: error: 'I2C_STATUS_OK' undeclared (first use in this function); did you mean 'STATUS_OK'?
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10 |
19 | status = I2C_STATUS_OK;
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11 |
| ^~~~~~~~~~~~~
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12 |
| STATUS_OK
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13 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\t.c:19:12: note: each undeclared identifier is reported only once for each function it appears in
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14 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\t.c:20:8: warning: passing argument 1 of 'test' from incompatible pointer type [-Wincompatible-pointer-types]
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15 |
20 | test(&status);
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| ^~~~~~~
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17 |
| |
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18 |
| volatile int *
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19 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\t.c:9:42: note: expected 'volatile STATUS_CODE_t *' but argument is of type 'volatile int *'
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20 |
9 | static void test(volatile STATUS_CODE_t *status)
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| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
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22 |
exit status 1
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23 |
unknown type name 'I2C_STATUS_CODE_t'
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Und mein C++ sagt:
1 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\sketch_feb01d.ino: In function 'void test(volatile STATUS_CODE_t*)':
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2 |
sketch_feb01d:11:14: error: no match for 'operator==' (operand types are 'volatile STATUS_CODE_t*' and 'STATUS_CODE_t')
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3 |
11 | if (status == STATUS_OK)
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4 |
| ~~~~~~ ^~ ~~~~~~~~~
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5 |
| | |
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6 |
| | STATUS_CODE_t
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7 |
| volatile STATUS_CODE_t*
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8 |
sketch_feb01d:13:5: error: 'nop' was not declared in this scope
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9 |
13 | nop();
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10 |
| ^~~
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11 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\sketch_feb01d.ino: In function 'int main()':
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12 |
sketch_feb01d:18:12: error: 'I2C_STATUS_CODE_t' does not name a type; did you mean 'STATUS_CODE_t'?
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13 |
18 | volatile I2C_STATUS_CODE_t status;
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14 |
| ^~~~~~~~~~~~~~~~~
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15 |
| STATUS_CODE_t
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16 |
sketch_feb01d:19:3: error: 'status' was not declared in this scope; did you mean 'static'?
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17 |
19 | status = I2C_STATUS_OK;
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18 |
| ^~~~~~
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19 |
| static
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20 |
sketch_feb01d:19:12: error: 'I2C_STATUS_OK' was not declared in this scope; did you mean 'STATUS_OK'?
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21 |
19 | status = I2C_STATUS_OK;
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22 |
| ^~~~~~~~~~~~~
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23 |
| STATUS_OK
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24 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\sketch_feb01d.ino: At global scope:
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25 |
E:\Programme\arduino\portable\sketchbook\sketch_feb01d\sketch_feb01d.ino:9:13: warning: 'void test(volatile STATUS_CODE_t*)' defined but not used [-Wunused-function]
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26 |
9 | static void test(volatile STATUS_CODE_t *status)
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27 |
| ^~~~
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28 |
exit status 1
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29 |
no match for 'operator==' (operand types are 'volatile STATUS_CODE_t*' and 'STATUS_CODE_t')
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Natürlich darf man einen Pointer prüfen, ob er Null ist.
Aber das will man hier ja wohl nicht, einen Pointer auf Null prüfen, sondern das worauf er zeigt.
C ist da weniger pingelig, als C++.
