Question

编写一个函数delchar（char*s1，char s2），从字符串s1中删除与字符s2相同的字符。用main（）测试该函数

必须用iostream

Answer 1

#include<iostream>
using namespace std;

void delchar(char* s1, char s2);

int main()
{
char mystring[100];
char mychar;
cout << "input a string(less than 100 chars):";
cin >> mystring;
cout << "input a char:";
cin >> mychar;

cout << "original string: " << mystring << "\n";
delchar(mystring, mychar);

cout << "after delchar: " << mystring << "\n";

return 0;
}

// 算法思想：将删除所s2后的数组先放在一个新的数组中，最后全部复制到原地址
void delchar(char* s1, char s2)
{
char temp[100];

while(*s1 != '0')
{
if(*s1 == s2)
{
s1++;
continue;
}
*temp = *s1;
temp++;
s1++;
}
*temp = '\0';

while( (*s1++ = *temp++) != '\0' );
}