Compilare: user.cpp: In function ‘int main()’: user.cpp:16:36: warning: format ‘%c’ expects argument of type ‘char*’, but argument 3 has type ‘int*’ [-Wformat=] fscanf(fi,"%c " ,&mat[i][j]); ^ user.cpp:9:25: warning: unused variable ‘cnt’ [-Wunused-variable] int i,j,n,m,l1,l2,c,cnt; ^ user.cpp:13:31: 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:16:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%c " ,&mat[i][j]); ^