Compilare: user.cpp: In function ‘void ve(int&, int&)’: user.cpp:42:7: warning: left operand of comma operator has no effect [-Wunused-value] l,c,h; ^ user.cpp:42:9: warning: right operand of comma operator has no effect [-Wunused-value] l,c,h; ^ user.cpp:42:10: warning: right operand of comma operator has no effect [-Wunused-value] l,c,h; ^ user.cpp: In function ‘unsigned int getint()’: user.cpp:24:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ user.cpp:29:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ user.cpp: In function ‘int main()’: user.cpp:128:18: warning: iteration 160024 invokes undefined behavior [-Waggressive-loop-optimizations] dpc[1][i]=l; ~~~~~~~~~^~ user.cpp:120:18: note: within this loop for(int i=1;i<10*DN;i++) ^ user.cpp:109:18: warning: iteration 160024 invokes undefined behavior [-Waggressive-loop-optimizations] dpl[1][i]=l; ~~~~~~~~~^~ user.cpp:101:18: note: within this loop for(int i=1;i<10*DN;i++) ^