Error in my switch case

So I'm trying to make an input function That takes in things separated by a comma and puts each thing into it's own array. I think I almost have it figured with this switch, but it gets stuck in the second statement. I don't know why.

/*************************************************************************

3/25/2015
This program takes in a file of the format
    PART,2.000,-1,0.050,V
    PART,0.975,-1,0.025,V
    PART,3.000,+1,0.010,F
    GAP,0.000,0.080
does the tolerance analysis
**************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#define BUFFER_SIZE 1024
#define ARRAYSIZE 100
void input(char *gapPart, float *nom,float *tollerance,int *SIGNS,char *V_F,float Spec_Minnimum,float Spec_Maximum);
void toleracningPt1(int size, char gapPart[], float nom[],float tollerance[],int SIGNS[],char V_F[],float Spec_Minnimum,float Spec_Maximum);
int main(){
    /**Decs**/
    float nom[ARRAYSIZE]; //holds the nominal values (2.00, .975 ect)
    float tollerance[ARRAYSIZE]; //holds the third value (.05, .025, ect)
    int SIGNS[ARRAYSIZE]; // signifies if the value goes up or down
    char gapPart[ARRAYSIZE];// holds the value if it's a gap or part
    char V_F[ARRAYSIZE]; // F things cannot be changed, V things can be
    int size=0;
    float Spec_Minnimum=0, Spec_Maximum=0;
    /**custom functions**/
    input(gapPart, nom, tollerance, SIGNS, V_F, Spec_Minnimum, Spec_Maximum);
    toleracningPt1(size, gapPart,nom, tollerance, SIGNS, V_F, Spec_Minnimum, Spec_Maximum);
    return 0;
    }
 /***********************************************************************************************************/
void input(char *gapPart,float *nom,float *tollerance,int *SIGNS,char *V_F,float Spec_Minnimum,float Spec_Maximum){

    const char *delimiterCharacters = " ";
    const char *delimiterCharacters2 = ",";
    const char *filename = "tin.txt";
    FILE *inputFile = fopen( filename, "r" );
    char buffer[ BUFFER_SIZE ];
    char *lastToken;
    int i=1, step;

    printf("File Data\n");
    /* usual error check*/
    if(inputFile == NULL ){
        fprintf( stderr, "Unable to open file %s\n", filename );
    }else{
        /**Prints out contents of the file **/
        while( fgets(buffer, BUFFER_SIZE,inputFile) != NULL ){// while there is stuff to do this with
            lastToken = strtok( buffer, delimiterCharacters );
            while( lastToken != NULL ){//same song..
                printf( "%s\n", lastToken );
                lastToken = strtok( NULL, delimiterCharacters );// clear out lastToken
            }

        }

        rewind(inputFile);

         while( fgets(buffer, BUFFER_SIZE,inputFile) != NULL ){// while there is stuff to do this with
            lastToken = strtok( buffer, delimiterCharacters2 );
            while( lastToken != NULL ){//same song..
                //strtok into seperate arrays
                while(i=1,i<5,++i){
                switch(i){
                    case 1:
                        fscanf(inputFile,"%s\n", &gapPart[i]);
                        printf("debug1");
                        ++i;
                    break;
                    case 2:
                        printf("debug2");
                        fscanf(inputFile,"%f\n", &nom[i]);
                        ++i;
                    break;
                    case 3:
                        printf("debug3");
                        fscanf(inputFile,"%d\n", &SIGNS[i]);
                        ++i;
                    break;
                    case 4:
                        printf("debug4");
                        fscanf(inputFile,"%f\n", &tollerance[i]);
                    break;
                    case 5:
                        printf("debug5");
                        fscanf(inputFile,"%c\n", &V_F[i]);
                    break;
                    default:
                        printf("Error");
                    }
                }


                }
                lastToken = strtok( NULL, delimiterCharacters2 );// clear out lastToken
            }
         }



        fclose(inputFile );

    }


/*****************************************************************************************************************/
void toleracningPt1(int size, char gapPart[], float nom[],float tollerance[],int SIGNS[],char V_F[],float Spec_Minnimum,float Spec_Maximum)
{
    int x;
    float Act_Gap, Act_Tollerance, Maximum_Gap = 0.0, Minnimum_Gap = 0.0;
    for ( x=0, Act_Gap = 0; x<size; x++){   //does tolerance math
                Act_Gap = Act_Gap + (nom[x]*SIGNS[x]);
    }
    for ( x=0, Act_Tollerance = 0; x<size; x++){
                    Act_Tollerance = Act_Tollerance + (tollerance[x]);
    }
    for (x= 0, Maximum_Gap = 0; x<size; x++){
                    Maximum_Gap = (nom[x]*SIGNS[x]+tollerance[x])+Maximum_Gap;
                    Minnimum_Gap = (nom[x]*SIGNS[x]-tollerance[x])+Minnimum_Gap;
    }

    printf("Actual Gap Mean: %.3f\"\n", Act_Gap);  //printing
    printf("Actual Gap Tolerance: %.3f\"\n", Act_Tollerance);
    if (Maximum_Gap > Spec_Maximum){
        printf("The maximum gap (%.3f\") is (Greater) than specified (%.3f\")\n", Maximum_Gap, Spec_Maximum);
    }
    if (Maximum_Gap < Spec_Maximum){
        printf("The maximum gap (%.3f\") is (Less) than specified (%.3f\")\n", Maximum_Gap, Spec_Maximum);
    }
    if (Minnimum_Gap > Spec_Minnimum){
        printf("The minimum gap (%.3f\") is (Greater) than specified (%.3f\")\n", Minnimum_Gap, Spec_Minnimum);
    }
    if (Minnimum_Gap < Spec_Minnimum){
        printf("The minimum gap (%.3f\") is (Less) than specified (%.3f\")\n", Minnimum_Gap, Spec_Minnimum);
    }
}