标签:华为机试 正整数加减运算式 整数加减 100内整数加减
题目:正整数加减运算式输入:“9 ++ 7” 输出:“0” 注:格式错误
#include <iostream>
#include <string>
using namespace std;
#define N 10
void arithmetic(const char *pInputStr, long lInputLen, char *pOutputStr)
{
char ch;
int index1 = 0;
int index2 = 0;
int index3 = 0;
char op1[N];
char op[N];
char op2[N];
int cnt = 0;
for(int i = 0; i < lInputLen; i++)
{
ch = pInputStr[i];
if(ch == ' ')
{
cnt++;
if(cnt > 2)
{
cout << "空格多余!"<<endl <<endl;
return;
}
continue;
}
if(cnt == 0) //操作数op1.
op1[index1++] = ch;
else if(cnt == 1) //操作符.
{
op[index2++] = ch;
if(index2 > 1)//判断类似++的情况.
{
cout << "格式错误!"<<endl <<endl;
return;
}
}
else if(cnt == 2) //操作数op2.
{
op2[index3++] = ch;
}
}
op1[index1] = op[index2] = op2[index3] = '\0';
int iop1 = atoi(op1);
int iop2 = atoi(op2);
int temp = 0;
if(op[0] == '+')
temp = iop1 + iop2;
else if(op[0] == '-')
temp = iop1 - iop2;
cout << temp << endl <<endl;
}
int main()
{
// char *pch1 = "4 + 7";
// int len1 = strlen(pch1);
// char result1[N];
// arithmetic(pch1,len1,result1);
char a[100];
char result[100];
while(gets(a)){
arithmetic(a,strlen(a),result);
}
cout<<endl;
return 0;
}
测试结果,可能想的不周全,欢迎查漏补缺:
标签:华为机试 正整数加减运算式 整数加减 100内整数加减
原文地址:http://blog.csdn.net/wtyvhreal/article/details/42193583