Compilare: user.cpp: In function ‘int main()’: user.cpp:204:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&m,&k); ^ user.cpp:208:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&a[i]); ^ user.cpp:213:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&b[i]); ^ user.cpp: In function ‘void mrg(int*, int, int*, int, bool)’: user.cpp:39:6: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] int st,dr; ^ user.cpp:88:11: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(myst*dr+(m-myst)*(n-dr) == max) ^ user.cpp:98:20: warning: ‘myst’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(st!=dr && myst!=mydr) ^ user.cpp:98:20: warning: ‘mydr’ may be used uninitialized in this function [-Wmaybe-uninitialized]