怎么在主函数内调用这个
std::string& ClearAllSpace(std::string &str)
{
int index = 0;
if (!str.empty())
{
while ((index = str.find(' ', index)) != std::string::npos) {
str.erase(index, 1);
}
}
return str;
}
#include<iostream>
#include <cstring>
#include <stdio.h>
#include<ctype.h>
#define N 1000
using namespace std;
int Lengh(char a[])
{
int i = 0, j = 0;
while(a[i] != '\0')
{
if(a[i] != ' ')
{
if(a[i] != '0' && a[i] != '1')
return 0;
j++;
}
i++;
}
return j;
}
void mul(char int1[],char int2[],int n)
{
char *sum = new char[2*(n+1)];
char *temp = new char[2*(n+1)];
printf("%*s\n",2*(n+1),int1);
printf("€");
printf("%*s\n",2*n+1,int2);
printf("%*s",n+1,"×");
for(int i = 0; i < n+2; i++)
printf("-");
printf("\n");
for(int i = 0; i < 2*(n+1); i++) {
sum[i] = '0';
temp[i] = '0';
}
for(int i = n; i > -1; i--) {
if(int2[i]=='1')
{
for(int k = 0; k < 2*(n+1); k++)
{
temp[k] = '0';
}
for(int j = n; j > -1; j--)
{
temp[j+i+1] = int1[j];
}
bool carry = false;
for(int i = (2*n + 1); i > -1; i--)
{
if(!carry)
{
if((sum[i]^temp[i])==0)
{
if((sum[i]=='1')&&(temp[i]=='1'))
{
carry = true;
}
sum[i] = '0';
}
else
{
sum[i] = '1';
}
} else
{
if((sum[i]^temp[i])==0)
{
carry = ((sum[i]=='1')&&(temp[i]=='1')) ? true : false;
sum[i] = '1';
}
else
{
sum[i] = '0';
carry = true;
}
}
}
printf("%*s\n",n+2+i,int1);
}
else
{
printf("%*s",i+1,"");
for(int k = 0; k < n+1; k++)
printf("0");
printf("\n");
}
}
for(int i = 0; i < (n+1); i++)
{
int1[i] = sum[i];
}
for(int i = (n+1); i < 2*(n+1); i++)
{
int2[i-n-1] = sum[i];
}
for(int i = 0; i < 2*(n+1); i++)
printf("-");
printf("\n");
for(int i=0; i<2*(n+1); i++)
cout<<sum[i];
cout<<endl;
}
std::string& ClearAllSpace(std::string &str)
{
int index = 0;
if (!str.empty())
{
while ((index = str.find(' ', index)) != std::string::npos) {
str.erase(index, 1);
}
}
return str;
}
int main()
{
char *c = new char[N];
char *d = new char[N];
do
{
int a = 0, b = 0;
cout << "请输入两个二进制乘数，可以加空格，输入quit退出程序" << endl;
cout << "A=";
cin.getline(c,N,'\n');
if(strcmp(c, "quit") == 0)
break;
cout << "B=";
cin.getline(d,N,'\n');
if(strcmp(d, "quit") == 0)
break;
a = Lengh(c);
b = Lengh(d);
if(a != b || a==0 || b==0)
{
cout << "输入的二进制数不正确，或者是两数长度不匹配" << endl;
continue;
}
c=ClearAllSpace(c);
d=ClearAllSpace(d);
a = a - 1;
mul(c,d,a);
cout<<"\n================="<<endl;
}
while(true);
return 0;
}
