可能重复:
比较两个C风格字符串的正确功能是什么?
我的比赛条件不起作用!有人可以建议如何比较C风格的字符串?
void saveData(string line, char* data){
char *testString = new char[800];
char *stpr;
int i=0;
bool isData=false;
char *com = data;
strcpy(testString,line.c_str());
stpr = strtok(testString, ",");
while (stpr != NULL) {
string temp = stpr;
cout << temp << " ===== " << data << endl;
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尽管temp
和data
比赛,以下条件不工作:
if (stpr==data) {
isData = true;
}
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不确定这是否有帮助.该SaveData()
函数从以下函数调用:
void readFile(char* str){
string c="", line, fileName="result.txt", data(str);
ifstream inFile;
inFile.open(fileName.c_str());
resultlist.clear();
if(inFile.good()){
while(!inFile.eof()){
getline(inFile, line);
if(line.find(data)!=string::npos){ …
Run Code Online (Sandbox Code Playgroud) 我有一个boolean for while循环的问题.因此,我切换到for循环.但是,在满足条件后,我无法更改布尔值.
doFirst= true
for (( j=1; j<=7; j++))
do
letter="A"
seatChoses=$letter$j
flagRand=$(echo $flightSeatBooked | awk -v flseatRand=$flightSeatBooked -v orseatRand=$seatChoses '{print match(flseatRand, orseatRand)}')
if $doFirst ; then
**$doFirst= false** // Here is the error!
if [ $flagRand -eq 0 ]; then
echo "System generated a slot, "$seatChoses" for you. [Y or N]"
fi
fi
done
Run Code Online (Sandbox Code Playgroud) 在对向量的迭代器中访问对的值时,为什么会出现以下错误?
vector< pair<int,string> > mapper;
if(Hash(input, chordSize) != id){
mapper.push_back(make_pair(tmp, input));
}
for (vector< pair<int,string> >::iterator it = mapper.begin(); it != mapper.end(); ++it)
{
cout << "1st: " << *it.first << " " // <-- error!
<< "2nd: " << *it.second << endl; // <-- error!
}
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错误信息:
main_v10.cpp:165:25:错误:'std :: vector >>> :: iterator'没有名为'first'main_v10.cpp的成员:165:56:错误:'std :: vector >>> :: iterator'有没有名为'second'的会员
我怎样才能解决这个问题?
我下载了最新的Bootstrap v3文件并导入了bootstrap.min.css.但我永远无法使用Glyphicon图标.我很确定我的CSS是对的.下面是我的HTML.为什么?
<span class="input-group-addon"><span class="glyphicon glyphicon-calendar"></span>
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我可以连接下面的查询吗?如果不是,我该怎么办?我不想读取行,$retrieveUnitExist
因为它浪费了另一步.
$retrieveUnitExist = "SELECT unitid FROM ESTATEUNIT WHERE BLOCK = 1";
$insertAddress = "INSERT INTO ADDRESS (value1, value2) VALUES ('1','".$retrieveUnitExist."')";
mysqli_query($conn, $insertAddress);
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c-strings ×1
css ×1
glyphicons ×1
iterator ×1
javascript ×1
php ×1
shell ×1
sql ×1
vector ×1