Compilare: user.cpp: In function ‘int main()’: user.cpp:18:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&m,&n); ^ user.cpp:22:40: 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:33:43: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(min>mat[li][j]+mat[li+1][j]&&j!=lj) ^