Compilare: user.cpp: In function ‘void citire()’: user.cpp:32:9: warning: unused variable ‘c’ [-Wunused-variable] int c, x, y; ^ user.cpp:32:12: warning: unused variable ‘x’ [-Wunused-variable] int c, x, y; ^ user.cpp:32:15: warning: unused variable ‘y’ [-Wunused-variable] int c, x, y; ^ user.cpp: In function ‘void Kruskal()’: user.cpp:59:16: warning: unused variable ‘j’ [-Wunused-variable] int muchie,j,cTotal=0,nrM=0, rootx, rooty; //numarul muchiilor selectate e 0 ^ user.cpp: In function ‘int main()’: user.cpp:23:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","rt",stdin); ^ user.cpp:24:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","wt",stdout); ^ user.cpp: In function ‘void citire()’: user.cpp:36:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &V[i].x, &V[i].y, &V[i].c); ^