Eroare de compilare: user.cpp:8:9: error: ‘long int y1’ redeclared as different kind of symbol long x1,y1,r1,x2,y2,r2,q,t; ^~ In file included from /usr/include/features.h:367:0, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/os_defines.h:39, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/c++config.h:507, from /usr/include/c++/6/iostream:38, from user.cpp:1: /usr/include/bits/mathcalls.h:251:1: note: previous declaration ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:17:59: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘double (*)(double) throw ()’ [-Wformat=] scanf("%ld%ld%ld%ld%ld%ld",&x1,&y1,&r1,&x2,&y2,&r2); ^ user.cpp:18:39: warning: pointer to a function used in arithmetic [-Wpointer-arith] dist=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)); ^~ user.cpp:18:47: warning: pointer to a function used in arithmetic [-Wpointer-arith] dist=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)); ^~ user.cpp:18:42: error: invalid operands of types ‘double (*)(double) throw ()’ and ‘double (*)(double) throw ()’ to binary ‘operator*’ dist=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)); ~~~~~~~^~~~~~~~ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri.in","r",stdin); ^ user.cpp:13:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri.out","w",stdout); ^ user.cpp:14:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&t); ^ user.cpp:17:60: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld%ld%ld%ld%ld",&x1,&y1,&r1,&x2,&y2,&r2); ^