src.c: In function 'main':
src.c:4:42: error: redeclaration of 'n' with no linkage
int i,j=0,n,a,b,x,y,z,c,d,e,f,g,h,k,l,m,n,o,p;
^
src.c:4:12: note: previous declaration of 'n' was here
int i,j=0,n,a,b,x,y,z,c,d,e,f,g,h,k,l,m,n,o,p;
^