Compilare: user.cpp:6:17: warning: ‘_stklen’ initialized and declared ‘extern’ [enabled by default] extern unsigned _stklen = 64000; ^ user.cpp: In function ‘int main()’: user.cpp:43:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d\n",&n,&m); ^ user.cpp:49:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {fscanf(f,"%c",&ch); ^ user.cpp:53:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"\n");} ^