while compiling my code I get the following message:
matfunoperable.cpp: In member function ?virtual void
matfunoperable::qrdelete(gsl_matrix*, gsl_matrix*, size_t, char)?:
matfunoperable.cpp:32: warning: suggest parentheses around assignment
used as truth value
matfunoperable.cpp:35: warning: suggest parentheses around assignment
used as truth value
Code snippet that contains lines 32 and 35:
32 for (size_t iter = 0; iter = j-2; iter++){
33
gsl_vector_memcpy(&gsl_matrix_column(R_new,iter).v ector,&gsl_matrix_column(R,iter).vector);
34 }
35 for (size_t iter = j-1; iter = n-1; iter++){
36
gsl_vector_memcpy(&gsl_matrix_column(R_new,iter).v ector,&gsl_matrix_column(R,(iter+1)).vector);
37 }
prototype of the function (in the .h file) in which the above snippet
is contained is:
virtual void qrdelete(gsl_matrix *Q_new, gsl_matrix *R_new, const
size_t j, const char orient);
The executable is formed. However when I run the executable, none of
the instructions in main() are executed. Can anyone throw some light on
what is happening here?
Thanks,
A 4 1830
A wrote: while compiling my code I get the following message:
matfunoperable.cpp: In member function ?virtual void matfunoperable::qrdelete(gsl_matrix*, gsl_matrix*, size_t, char)?: matfunoperable.cpp:32: warning: suggest parentheses around assignment used as truth value matfunoperable.cpp:35: warning: suggest parentheses around assignment used as truth value Code snippet that contains lines 32 and 35:
32 for (size_t iter = 0; iter = j-2; iter++){
Common bug which your compiler is kind enough to point out - you are
using assignment (=) rather than equality (==).
--
Ian Collins.
A wrote: while compiling my code I get the following message:
matfunoperable.cpp: In member function ?virtual void matfunoperable::qrdelete(gsl_matrix*, gsl_matrix*, size_t, char)?: matfunoperable.cpp:32: warning: suggest parentheses around assignment used as truth value matfunoperable.cpp:35: warning: suggest parentheses around assignment used as truth value Code snippet that contains lines 32 and 35:
32 for (size_t iter = 0; iter = j-2; iter++){
The executable is formed. However when I run the executable, none of the instructions in main() are executed. Can anyone throw some light on what is happening here?
You're compiler is giving you a pretty good idea. Is it really your
intention to assign the value of j - 2 to iter and then test to make
sure the result is not 0?
What occurs is actually the best that could happen...other option is
infinite loop.
Ian Collins wrote: A wrote:
while compiling my code I get the following message:
matfunoperable.cpp: In member function ?virtual void matfunoperable::qrdelete(gsl_matrix*, gsl_matrix*, size_t, char)?: matfunoperable.cpp:32: warning: suggest parentheses around assignment used as truth value matfunoperable.cpp:35: warning: suggest parentheses around assignment used as truth value Code snippet that contains lines 32 and 35:
32 for (size_t iter = 0; iter = j-2; iter++){
Common bug which your compiler is kind enough to point out - you are using assignment (=) rather than equality (==).
Or whatever comparison operator you intended.
--
Ian Collins.
Thank you all. This was so unexpected.
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