Eroare de compilare: user.cpp: In function ‘void SearchS1()’: user.cpp:81:18: error: ‘abs’ was not declared in this scope int L=abs(S1x-Tx),W=abs(S1y-Ty); ^ user.cpp:82:14: error: ‘W’ was not declared in this scope int D=gcd(L,W); ^ user.cpp: In function ‘void SearchS2()’: user.cpp:95:18: error: ‘abs’ was not declared in this scope int L=abs(S2x-Tx),W=abs(S2y-Ty); ^ user.cpp:96:14: error: ‘W’ was not declared in this scope int D=gcd(L,W); ^ user.cpp: In function ‘void r(int&)’: user.cpp:37:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==MAX)fread(f,1,MAX,stdin),pos=0; ^ user.cpp:42:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==MAX)fread(f,1,MAX,stdin),pos=0; ^ user.cpp: In function ‘int main()’: user.cpp:116:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.in","r",stdin); ^ user.cpp:117:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.out","w",stdout); ^ user.cpp:118:25: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,stdin); ^