Compilare: main.cpp: In function 'int main()': main.cpp:62:33: warning: unused variable 'val' [-Wunused-variable] int rad=sqrt(p),val=expow(g,rad); ^~~ main.cpp:53:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dlog.in","r",stdin); ^ main.cpp:54:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dlog.out","w",stdout); ^ main.cpp:57:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ main.cpp:61:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&p,&g,&y); ^