Compilare: main.cpp: In function 'int main()': main.cpp:44:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin); ^ main.cpp:45:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("exp.out","w",stdout); ^ main.cpp:47:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&m,&n); ^ main.cpp:50:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:13:11: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] r = a % b; ~~^~~~~~~ main.cpp:42:5: note: 'a' was declared here int main() ^~~~ main.cpp:69:13: warning: 'cmdc' may be used uninitialized in this function [-Wmaybe-uninitialized] if(cmdc % m == 0) ~~~~~^~~ main.cpp:64:21: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i = pos+1 ; i <= 30000 ; i++) ^