Compilare: user.cpp: In function ‘int smek(int&, int&, int, int)’: user.cpp:10:9: warning: unused variable ‘cmmdc’ [-Wunused-variable] int cmmdc=smek(x,y,b,a%b); ^ user.cpp: In function ‘int main()’: user.cpp:20:9: warning: unused variable ‘d’ [-Wunused-variable] int d,k,x=1,y=0; ^ user.cpp:20:11: warning: unused variable ‘k’ [-Wunused-variable] int d,k,x=1,y=0; ^ user.cpp: In function ‘int smek(int&, int&, int, int)’: user.cpp:14:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:18:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.in","r",stdin); ^ user.cpp:19:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.out","w",stdout); ^ user.cpp:21:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&c,&n); ^