Compilare: user.cpp: In function ‘int main()’: user.cpp:39:15: warning: unused variable ‘lin’ [-Wunused-variable] int i,j,t,lin,col,auxc; ^ user.cpp:39:19: warning: unused variable ‘col’ [-Wunused-variable] int i,j,t,lin,col,auxc; ^ user.cpp:39:23: warning: unused variable ‘auxc’ [-Wunused-variable] int i,j,t,lin,col,auxc; ^ user.cpp:42:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&t); ^ user.cpp:43:31: 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:46:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&mat[i][j]); ^