#include<stdlib.h>
#include<stdio.h>
#include<math.h> /*Optional, but better if included as fabs, labs and abs functions are being used. */

int main(int argC, char* argV[])
{

    int i,zeroCount= 0,firstNonZero = -1;
    double* vector;

    if(argC == 1){
        printf("Usage : %s <Vector component coefficients seperated by single space>",argV[0]);
    }

    else{

        printf("Vector for [");
        for(i=1;i<argC;i++){
            printf("%s,",argV[i]);
        }
        printf("\b] -> ");


        vector = (double*)malloc((argC-1)*sizeof(double));

        for(i=1;i<=argC;i++){
            vector[i-1] = atof(argV[i]);
            if(vector[i-1]==0.0)
                zeroCount++;
            if(vector[i-1]!=0.0 && firstNonZero==-1)
                firstNonZero = i-1;
        }

        if(zeroCount == argC){
            printf("0");
        }

        else{
            for(i=0;i<argC;i++){
                if(i==firstNonZero && vector[i]==1)
                    printf("e%d ",i+1);
                else if(i==firstNonZero && vector[i]==-1)
                    printf("- e%d ",i+1);
                else if(i==firstNonZero && vector[i]<0 && fabs(vector[i])-abs(vector[i])>0.0)
                    printf("- %lf e%d ",fabs(vector[i]),i+1);
                else if(i==firstNonZero && vector[i]<0 && fabs(vector[i])-abs(vector[i])==0.0)
                    printf("- %ld e%d ",labs(vector[i]),i+1);
                else if(i==firstNonZero && vector[i]>0 && fabs(vector[i])-abs(vector[i])>0.0)
                    printf("%lf e%d ",vector[i],i+1);
                else if(i==firstNonZero && vector[i]>0 && fabs(vector[i])-abs(vector[i])==0.0)
                    printf("%ld e%d ",vector[i],i+1);
                else if(fabs(vector[i])==1.0 && i!=0)
                    printf("%c e%d ",(vector[i]==-1)?'-':'+',i+1);
                else if(i!=0 && vector[i]!=0 && fabs(vector[i])-abs(vector[i])>0.0)
                    printf("%c %lf e%d ",(vector[i]<0)?'-':'+',fabs(vector[i]),i+1);
                else if(i!=0 && vector[i]!=0 && fabs(vector[i])-abs(vector[i])==0.0)
                    printf("%c %ld e%d ",(vector[i]<0)?'-':'+',labs(vector[i]),i+1);
            }
        }
    }

    free(vector);

    return 0;
}