ljd_1881的专栏

/*     binary search     when an array is ordered ,we cna use binary_search to check whether  an element in the array   Author :ljd*/#includeint binary_search(int a[],int x,int len);  //len is the len

t:main.c  arith_expr.h arith_expr.c    gcc -o t ./main.c arith_expr.c