Compilare: user.cpp: In function ‘int main()’: user.cpp:59:41: warning: right operand of comma operator has no effect [-Wunused-value] c[i][j]=a[i][j],c[i+1][j]; ^ user.cpp:27:77: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld%lld%lld%lld%lld%lld%lld%lld",&p,&n,&m,&v,&xn,&xs,&yv,&ye); ^ user.cpp:30:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&a[i][j]); ^