Compilare: user.cpp:2:10: warning: ISO C99 requires whitespace after the macro name [enabled by default] #define w{fscanf(f,"%d",&x);while(p<=u && x<=q[u][0])u--;q[++u][0]=x;q[u][1]=i;} ^ user.cpp: In function ‘int main()’: user.cpp:9:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:2:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] #define w{fscanf(f,"%d",&x);while(p<=u && x<=q[u][0])u--;q[++u][0]=x;q[u][1]=i;} ^ user.cpp:10:22: note: in expansion of macro ‘w’ for(i=1;i<=k;i++)w; ^ user.cpp:2:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] #define w{fscanf(f,"%d",&x);while(p<=u && x<=q[u][0])u--;q[++u][0]=x;q[u][1]=i;} ^ user.cpp:14:9: note: in expansion of macro ‘w’ w; ^