UVA 537

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int main()
{

    float P, U, I;
    char s[300];
    char temp[100];
    int N, count = 0, k, i, j;
    scanf( "%d", &N );
    getchar();
    while( N-- )
    {
        
        P = U = I = 0;
        gets(s);
        printf( "Problem #%d\n", ++count );
        for( i = 0; i < strlen(s); i++ )
        {
            if( s[i] == '=' )
            {
                k = 0;
                switch( s[i-1] )
                {
                    case 'P':
                            for( j = i+1; !isalpha(s[j]); j++ )
                                temp[k++] = s[j];
                            temp[k] = '\0';
                            P = atof(temp);
                            if( s[j] == 'm' ) P *= 0.001; 
                            if( s[j] == 'k' ) P *= 1000;
                            if( s[j] == 'M' ) P *= 1000000;
                            break;
                    case 'U':
                            for( j = i+1; !isalpha(s[j]); j++ )
                                temp[k++] = s[j];
                            temp[k] = '\0';
                            U = atof(temp);
                            if( s[j] == 'm' ) U *= 0.001; 
                            if( s[j] == 'k' ) U *= 1000;
                            if( s[j] == 'M' ) U *= 1000000;
                            break;
                    case 'I':
                            for( j = i+1; !isalpha(s[j]); j++ )
                                temp[k++] = s[j];
                            temp[k] = '\0';
                            I = atof(temp);
                            if( s[j] == 'm' ) I *= 0.001; 
                            if( s[j] == 'k' ) I *= 1000;
                            if( s[j] == 'M' ) I *= 1000000;
                            break;
                }   
            }
        }
        if( P == 0 )printf("P=%.2lfW\n\n", 1.0*U*I ); 
        if( U == 0 )printf("U=%.2lfV\n\n", 1.0*P/I ); 
        if( I == 0 )printf("I=%.2lfA\n\n", 1.0*P/U ); 
    }
    return 0;
}