下面代码中的“if(key[i].compare(c)==0)return1;”这句语句是什么意思stringkey[15]={"begin","end","if","then","else","while","write","read","do","call","const","char","until","procedure","repeat"};intIskey(stringc){//关键字判

Question

下面代码中的“ if(key[i].compare(c)==0) return 1;”这句语句是什么意思
string key[15]={"begin","end","if","then","else","while","write","read",
"do","call","const","char","until","procedure","repeat"};
int Iskey(string c){ //关键字判断
int i;
for(i=0;i

Answer 1

compare是CString的成员函数,比较两个字符串的
【Zero if the strings are identical, < 0 if this CString object is less than lpsz, or > 0 if this CString object is greater than lpsz.】
if(key[i].compare(c)==0) return 1;
是key[i]与c比较,相等,直接返回1；
不等,一直不断比较,都不等,返回0
因此,这段代码就是判断c是否是关键字之一.