我正在尝试创建一个函数来计算字符串中特定字符的使用次数。给出错误的部分是：
#include <iostream>
#include <string>
using namespace std;
unsigned howMany(char c, const string & s);
string changeCase(const string & s);
int main() {
char z;
string name;
cout << "Enter char and string: ";
cin >> z;
getline(cin, name, '\n');
cout << howMany(z, name) << endl;
cout << changeCase(name) << endl;
}
unsigned howMany(char c, const string & s) {
unsigned count = 0;
for (unsigned i = 0; i < s.size(); i++)
{
if (c == s[i]) { count++; }
if (isupper(s[i])){ s[i] = tolower(s[i]);
count++;
}
}
return count;
}
代码：
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}
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line-height: 1;
font-size: 2.3em;
position: absolute;
top: 2px;
right: 2%;
text-decoration: none;
color: black;
}
a.close:hover {
color: #222;
-webkit-transition: color 1s ease;
-moz-transition: color 1s ease;
transition: color 1s ease;
}
.modal-box .modal-body {
z-index:9999 !important;
position: fixed;
width: 500px;
color: black;}
.modal-box {
position: fixed !important;
z-index: 9999 !important;
width: 550px !important;
top: 150px !important;
height:350px}
.modal-box header h3, .modal-box header h4, .modal-box .modal-header h3, .modal-box .modal-header h4 {
color: black;
font-family: 'Rajdhani';
font-weight: 800;
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text-align: center;
font-size: 25px; }
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margin-top: 240px;
z-index: 9999; }
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bottom: 10px; }
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width: 102%;
position: relative;
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audio {
width: 45px;
}
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top: 100px !important;
position: fixed !important;
z-index: 99 !important;
left: 2px;
display: block; }
.modal-body img {
width: 102%;
height: 210px;
position: relative;
bottom: 30px;}
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background: #3498db;
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background-image: linear-gradient(to bottom, #3498db, #2980b9);
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-moz-border-radius: 28;
border-radius: 28px;
-webkit-box-shadow: 0px 1px 3px #666666;
-moz-box-shadow: 0px 1px 3px #666666;
box-shadow: 0px 1px 3px #666666;
font-family: Arial;
color: #ffffff;
font-size: 20px;
padding: 10px 20px 10px 20px;
text-decoration: none;
}
.btn1:hover {
background: #3cb0fd;
background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
text-decoration: none;
}
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$("body").append(appendthis);
$(".modal-overlay").fadeTo(500, 0.7);
//$(".js-modalbox").fadeIn(500);
var modalBox = $(this).attr('data-modal-id');
$('#'+modalBox).fadeIn($(this).data());
});
$(".js-modal-close, .modal-overlay").click(function() {
$(".modal-box, .modal-overlay").fadeOut(500, function() {
$(".modal-overlay").remove();
});
});
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$(".modal-box").css({
top: ($(window).height() - $(".modal-box").outerHeight()) / 2,
left: ($(window).width() - $(".modal-box").outerWidth()) / 2
});
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答案 0 :(得分：3)
你声明s为const。你无法改变它。