Compilare: user.cpp: In function ‘void Back1(int)’: user.cpp:117:30: warning: unused variable ‘aux’ [-Wunused-variable] int fr[15],cnt=0,i,j,aux,poz=0,nraux[15]; ^ user.cpp: In function ‘int main()’: user.cpp:151:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("colectie.in","r",stdin); ^ user.cpp:152:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("colectie.out","w",stdout); ^ user.cpp:153:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n,&K); ^ user.cpp:156:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &col[i][j]); ^