Compilare: user.cpp: In function ‘int main()’: user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&N,&M); ^ user.cpp:23:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&mat[i][j]); ^ user.cpp:59:33: warning: ‘min2.dynamics::poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(min2.poz!=j) ^ user.cpp:33:18: warning: ‘min1.dynamics::poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] dynamics min1,min2; ^