怎么进行第二轮input?这个程序run到第二轮就bug了

#include
#include
#include

void run(char *name);
void Readfile1(float *Matrix,char *Filename,int m,int n);
void Readfile2(float *Matrix,char *Filename,int k);
void reshape(float *pB,float *pA);
void Addition(float *pD,float *pE,float *pF,int m);
void Multiply(float *pB,float *pC,float *pD,int m,int n,int k);
float max(float G,int m);
int SoftMax(float *pL,float *pS);


int main(int argc, char *argv[]){
    char string[50],str[6];
    int b,c=0;
    while(1){
           printf("Please input filenames:");
           gets(string);//read the files' name
        //puts(string);
        for(b = 0;string[b] != '\0';b++){
            if((string[b+1]==',')||(string[b+1] == '\0')){
                strncpy(str,string+c,b-c+1);
                puts(str);
                c = b+2;
                run(str);
            }
        }
        char z;
        printf("do you want to continue? please input [Y or N]:");
        getchar();
        scanf("%c",&z);
        if(z == 'Y')
            continue;
        if(z == 'N')//Only input N can we jump out of the loop
            break;
    }
    printf("Bye\n");
    return 0;
}


void run(char *name){
    FILE *image;
    int m = 0,i,j;
    float pixel[28][28],A[28][28],B[784];
    char skip[256],str[6];
    if(strncmp(str+1,".pgm",4)==0){
                          printf("%s\n",str);
        image = fopen("example0.pgm","rb");//open the image
        for(i = 0;i < 4;i++){
            fgets(skip,256,image);//skip the first four lines
        }
        for(i = 0;i < 28;i++){
            for(j = 0;j < 28;j++){
                pixel[i][j] = (float)fgetc(image);
                                //printf("%.2f ",(float)pixel[i][j]);
                   A[i][j] = pixel[i][j]/255.0;//assign the value of pixel/255.0 to matrix A
                                //printf("%.2f ",A[i][j]);
            }
                        //printf("\n");
        }
        fclose(image);
        reshape(B,A[0]);
        float C[784][128],D[128];
        Readfile1(C[0],"W1.txt",784,128);//Read data from "W1.txt" to C
        Multiply(B,&C[0][0],D,1,784,128);
                        //for(i=0;i<128;i++){
                            //printf("%.2f\n",D[i]);
                        //}
        float E[128],F[128];
        Readfile2(E,"B1.txt",128);//Read data from "B1.txt" to E
        Addition(D,E,F,128);
                        //for(i = 0;i < 128;i++){
                            //printf("%.2f\n",F[i]);
                        //}
        float G[128];
        for(m = 0;m < 128;m++){
            G[m] = max(F[m],0);
        }
                        //for(i = 0;i < 128;i++){
                            //printf("%.2f\n",G[i]);
                        //}
        float M[128][10],H[10];
        Readfile1(M[0],"W2.txt",128,10);//Read data from "W2.txt" to M
        Multiply(G,M[0],H,1,128,10);
                        //for(i=0;i<10;i++){
                            //printf("%f\n",H[i]);
                        //}
        float N[10],L[10];
        Readfile2(N,"B2.txt",10);//Read data from "B2.txt" to N
        Addition(H,N,L,10);
                     //for(i = 0;i < 10;i++){
                            //printf("%.2f\n",L[i]);
                        //}
        float S[10];
        int result;
        result = SoftMax(L,S);
        printf("%s:%d\n",str,result);
    }
    else{
        printf("Invalid file.\n");//If the file name entered dose not meet the requirement
    }
    return;
}


void Readfile1(float *Matrix,char *filename,int m,int n){
    int i,j;
    FILE *fp1;
    fp1 = fopen(filename,"r");
    if(fp1 == NULL)
        return ;
    for(i = 0;i < m;i++){
        for(j = 0;j < n;j++){
                fscanf(fp1,"%f",Matrix + i*n + j);//Read two-dimensional array
            //printf("%f\n",*(Matrix + i*n + j));
        }
    }
    fclose(fp1);
}

void Readfile2(float *Matrix,char *filename,int k){
    int i;
    FILE *fp2;
    fp2 = fopen(filename,"r");
    if(fp2 == NULL)
        return ;
    for(i = 0;i < k;i++){
        fscanf(fp2,"%f",Matrix + i);//Read one-dimensional array
    }
    fclose(fp2);
}

void reshape(float *pB,float *pA){
    for(int m = 0;m < 28;m++){
        for(int n = 0;n < 28;n++){
             *(pB + m * 28 + n) = *(pA + n + m * 28);////convert two-dimensional array to one-dimension array
        }
    }
}

void Multiply(float *pB,float *pC,float *pD,int m,int n,int k){
    int p,i,j;
     //printf("%.2f",*pB);
    for(i = 0;i < m;i++){
           for(j = 0;j < k;j++){
                  for(p = 0;p < n;p++){
                       *(pD + i * k + j) +=  (*(pB + i * n + p)) * (*(pC + p * k + j));//Multiply the matrix
                    }
                //printf("%.2f ",*(pD + i * k + j));
        }
    }
}

void Addition(float *pD,float *pE,float *pF,int m){
    int i;
       for(i = 0;i < m;i++){
           *(pF + i) = *(pD + i) + *(pE + i);//Add the matrix
    }
       return;
}

float max(float num,int m){
    if(num >= m)
           return num;
    else
           return 0.000000;//return negative numbers to zero
}


int SoftMax(float *pL,float *pS){
    int i,m,Max = 0;
       float sum = 0;
       double max = 0;
       for(i = 0;i < 10;i++){
           max = (double)*pL;
           if(max < (double)*(pL+i)){
                  max = (double)*(pL+i);
                  Max = i;//To find the max in *pL
        }
       }
       for(i = 0;i < 10;i++){
           sum += (float)exp(*(pL+i)-max);
       }
       for(m = 0;m < 10;m++){
           *(pS+m) = (float)(exp(*(pL+m)-max)) / sum;//S[m]=e^((L[m]-max?(L)))/(°∆_(i=0)^9?e^((L[i]-max?(L))) )
    }
    return Max;//Find the number corresponding to the maximum value
}

output:

如果你发现字符串少了一位，说明多加了getchar()把那一个字符读走了
如果你发现读入的字符串是个空，说明读到了个换行符，应该加个getchar()把换行读走
scanf会将换行遗弃在缓冲区里，所以后面需要加getchar
而gets会顺便把换行也读走，后面不需要加getchar