Compilare: main.cpp: In function 'int main()': main.cpp:10:9: warning: unused variable 'n' [-Wunused-variable] int n,con,i; ^ main.cpp:8:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("compress.in","r",stdin); ^ main.cpp:9:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("compress.out","w",stdout); ^ main.cpp:11:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(v,100001,stdin); ^