Compilare: user.cpp: In function ‘void lee()’: user.cpp:20:11: warning: unused variable ‘l’ [-Wunused-variable] int k,l,c,lv,cv,la,ca; ^ user.cpp:20:13: warning: unused variable ‘c’ [-Wunused-variable] int k,l,c,lv,cv,la,ca; ^ user.cpp: In function ‘int main()’: user.cpp:145:9: warning: unused variable ‘fgm1’ [-Wunused-variable] int fgm1,fgm2; ^ user.cpp:145:14: warning: unused variable ‘fgm2’ [-Wunused-variable] int fgm1,fgm2; ^ user.cpp: In function ‘void cit()’: user.cpp:98:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("insule.in","r",stdin); ^ user.cpp:99:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("insule.out","w",stdout); ^ user.cpp: In function ‘int main()’: user.cpp:104:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&m); ^ user.cpp:107:20: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccuMAJ7I.o: In function `main': user.cpp:(.text.startup+0x58): warning: the `gets' function is dangerous and should not be used.