江湖告急!为什么形成不了.exe

int comb(sqlist A,int na,sqlist B,int nb) { int n=na,m=nb; if(na+nb>maxlen) return 0; while(nb>0) { if((na==0)||(A[na-1]<B[nb-1])) { A[na+nb-1]=B[nb-1];//˵Ã÷B[nb-1]ÊǵÚna+nb´óÔªËØ nb--; } else { A[na+nb-1]=A[na-1];//˵Ã÷A[na-1]ÊǵÚna+nb´óÔªËØ na--; } } na=n+m; return na; }
Linking... LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main Debug/合并线性表.exe : fatal error LNK1120: 1 unresolved externals 执行 link.exe 时出错. 合并线性表.exe - 1 error(s), 0 warning(s)