Compilare: user.c: In function ‘main’: user.c:51:5: warning: implicit declaration of function ‘pow’ [-Wimplicit-function-declaration] if((k<=0)||(k>=pow(10,6))||(k>=n)||(n<=0)||(n>=pow(10,6))||(q<=1)||(x<=1)||(y<=1)||(z<=1)||(x>=pow(10,9))||(y>=pow(10,9))||(z>=pow(10,9))||q>=pow(10,9)) ^ user.c:51:20: warning: incompatible implicit declaration of built-in function ‘pow’ [enabled by default] if((k<=0)||(k>=pow(10,6))||(k>=n)||(n<=0)||(n>=pow(10,6))||(q<=1)||(x<=1)||(y<=1)||(z<=1)||(x>=pow(10,9))||(y>=pow(10,9))||(z>=pow(10,9))||q>=pow(10,9)) ^ user.c:47:34: warning: unused variable ‘j’ [-Wunused-variable] int n,k,x,y,z,q,i,smax=0,max,j; ^ user.c:47:30: warning: unused variable ‘max’ [-Wunused-variable] int n,k,x,y,z,q,i,smax=0,max,j; ^ user.c:50:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d%d%d%d",&n,&k,&q,&x,&y,&z); ^