UVA 537 人工智能

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <string>
using namespace std;
///
#define INF 0xffffff7
#define MAXN 200
char problem[MAXN];
char pp[MAXN];
char uu[MAXN];
char II[MAXN];
double prefix[] = {0.001, 1000, 1000000};
double P, U, I;

void readin(char num[], int pos)
{
int i, j;
j = 0;
for (i = pos; problem[i] != 'W' && problem[i] != 'A' && problem[i] != 'V'; i++)
{
num[j++] = problem[i];
}
}
double transfer(char num[])
{
int i, j;
double mul = 1;
double temp;
int len = strlen(num);
if (num[len - 1] == 'm')
{
mul = prefix[0];
num[len - 1] = '\0';
}
else if (num[len - 1] == 'k')
{
mul = prefix[1];
num[len - 1] = '\0';
}
else if (num[len - 1] == 'M')
{
mul = prefix[2];
num[len - 1] = '\0';
}
sscanf(num, "%lf", &temp);
temp *= mul;
return temp;

}

int main()
{
///
int i, j, th;
int nCases;
scanf("%d", &nCases);
getchar();
th = 1;
while (nCases--)
{
memset(pp, 0, sizeof(pp));
memset(uu, 0, sizeof(uu));
memset(II, 0, sizeof(II));
gets(problem);
int len = strlen(problem);
P = U = I = 0;
for (i = 0; i < len; i++)
{
if (problem[i] == '=')
{
switch(problem[i - 1])
{
case 'P':
readin(pp, i + 1);
break;
case 'U':
readin(uu, i + 1);
break;
case 'I':
readin(II, i + 1);
break;
}
}
}
printf("Problem #%d\n", th);
if (strlen(pp) == 0)
{
U = transfer(uu);
I = transfer(II);
P = U * I;
printf("P=%.2lfW\n", P);
}
else if (strlen(uu) == 0)
{
P = transfer(pp);
I = transfer(II);
U = P / I;
printf("U=%.2lfV\n", U);
}
else if (strlen(II) == 0)
{
P = transfer(pp);
U = transfer(uu);
I = P / U;
printf("I=%.2lfA\n", I);
}
printf("\n");
th++;
}

///
return 0;
}

#include<iostream>
#include<sstream>
#include<string>
#include<cstdio>
using namespace std;

int main()
{
/*
freopen("data.in","r",stdin);
freopen("data.out","w",stdout);
//*/

int T;
cin>>T;getchar();
for(int case_num=1;case_num<=T;case_num++)
{
string line;
getline(cin,line);
double P(-1.0),U(-1.0),I(-1.0);
istringstream sin(line);
char ch;
while(sin>>ch)
{
if(ch=='P')
{
char t;
sin>>t;
if(t!='=')
continue;
sin>>P;
sin>>t;
if(t=='m')
P/=1000;
else if(t=='k')
P*=1000;
else if(t=='M')
P*=1000000;
}
else if(ch=='U')
{
char t;
sin>>t;
if(t!='=')
continue;
sin>>U;
sin>>t;
if(t=='m')
U/=1000;
else if(t=='k')
U*=1000;
else if(t=='M')
U*=1000000;
}
else if(ch=='I')
{
char t;
sin>>t;
if(t!='=')
continue;
sin>>I;
sin>>t;
if(t=='m')
I/=1000;
else if(t=='k')
I*=1000;
else if(t=='M')
I*=1000000;
}
}

cout<<"Problem #"<<case_num<<endl;
if(P==-1.0)
printf("P=%.2fW\n",U*I);
else if(U==-1.0)
printf("U=%.2fV\n",P/I);
else
printf("I=%.2fA\n",P/U);
printf("\n");
}

return 0;
}