Compilare: user.cpp: In function ‘int main()’: user.cpp:40:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^ user.cpp:43:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&mat[i][j]); ^ user.cpp:23:22: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] c1=c+dc[i]; ^ user.cpp:37:22: note: ‘c’ was declared here int i,j,n,m,max,l,c,x,lin,col,x1,x2,flag,con; ^ user.cpp:22:22: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] l1=l+dl[i]; ^ user.cpp:37:20: note: ‘l’ was declared here int i,j,n,m,max,l,c,x,lin,col,x1,x2,flag,con; ^