Compilare: user.cpp: In function ‘int main()’: user.cpp:82:23: warning: unused variable ‘ok’ [-Wunused-variable] int k1,k2,ok=0,s=0; ^ user.cpp:47:38: warning: unused variable ‘s’ [-Wunused-variable] int i,j,ilmax=-1,jlmax=-1,smax=0,s; ^ user.cpp:46:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d\n",&t,&n,&m); ^ user.cpp:51:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c",&f[i][j]); ^ user.cpp:52:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"\n"); ^