标签:class blog code get 2014 string
题目:再一句话里面有P,I,U中的2个已知量,求第三个未知量。(P=I*U)
分析:字符串。利用‘=‘定位已知量,然后将‘=‘后面的的数字和单位分别读入处理。
说明:注意单位有m,k,M的前缀,以及小数点的处理;每组输出后面有一个空行。
#include <iostream> #include <cstdlib> #include <cstring> #include <cstdio> using namespace std; char Satz[1000]; int main() { int n; while ( ~scanf("%d",&n) ) { getchar(); for ( int t = 1 ; t <= n ; ++ t ) { gets(Satz); double pp = 0.0,ii = 0.0,uu = 0.0; int P = 0,I = 0,U = 0; for ( int j,i = 1 ; Satz[i] ; ++ i ) { if ( Satz[i] == '=' ) { double value = 0.0; int flag = 0; for ( j = i+1 ; Satz[j] ; ++ j ) { if ( Satz[j] == '.' ) { flag = 10;continue; } if ( Satz[j] < '0' || Satz[j] > '9') break; if ( flag ) { value += (Satz[j]-'0'+0.0)/flag; flag *= 10; }else { value *= 10; value += (Satz[j]-'0'+0.0); } } if ( Satz[j] == 'm' ) value *= 0.001; if ( Satz[j] == 'k' ) value *= 1000; if ( Satz[j] == 'M' ) value *= 1000000; if ( Satz[i-1] == 'P' ) { pp = value;P = 1; } if ( Satz[i-1] == 'U' ) { uu = value;U = 1; } if ( Satz[i-1] == 'I' ) { ii = value;I = 1; } } } printf("Problem #%d\n",t); if ( P && U ) printf("I=%.2lfA\n\n",pp/uu); if ( P && I ) printf("U=%.2lfV\n\n",pp/ii); if ( I && U ) printf("P=%.2lfW\n\n",ii*uu); } } return 0; }
UVa 537 - Artificial Intelligence?,布布扣,bubuko.com
UVa 537 - Artificial Intelligence?
标签:class blog code get 2014 string
原文地址:http://blog.csdn.net/mobius_strip/article/details/30393005