我真的要疯了 看不出来哪里出问题了啊qwq

#include<stdio.h>
#include<string.h>
int main()
{
    int i,j,x,y,z,x1,y1,z1,z2=0,x2=0,y2=0;
    char n,m,h;
    scanf("%d",&i);

    for(j=0;j<i;j++)
    {
        getchar();
        getchar();
        h=getchar();
        if(h>=97&&h<=99)
    {
        scanf("%d %d",&x,&y);
        switch(h)
        {
            case'a':
            m=h;
            x1=x;
            y1=y;
            z=x+y;
            z1=z;
            if(x1<=0)
            x2++;
            if(y1<=0)
            y2++;
            if(z1<=0)
            z2++;
            while (x1)
            {
                x2++;
                x1/=10;
            }
            while (y1)
            {
                y2++;
                y1/=10;
            }
            while (z1)
            {
                z2++;
                z1/=10;
            }
            printf("%d+%d=%d\n",x,y,z);
            printf("%d\n",2+x2+y2+z2);
            z2=x2=y2=0;
            break;
        case 'b':
            m=h;
            x1=x;
            y1=y;
            z=x-y;
            z1=z;
            if(x1<=0)
            x2++;
            if(y1<=0)
            y2++;
            if(z1<=0)
            z2++;
            while (x1)
            {
                x2++;
                x1/=10;
            }
            while (y1)
            {
                y2++;
                y1/=10;
            }
            while (z1)
            {
                z2++;
                z1/=10;
            }
            printf("%d-%d=%d\n",x,y,z);
            printf("%d\n",2+x2+y2+z2);
            z2=x2=y2=0;
            break;
        default:
            m=h;
            x1=x;
            y1=y;
            z=x*y;
            z1=z;
            if(x1<=0)
            x2++;
            if(y1<=0)
            y2++;
            if(z1<=0)
            z2++;
            while (x1)
            {
                x2++;
                x1/=10;
            }
            while (y1)
            {
                y2++;
                y1/=10;
            }
            while (z1)
            {
                z2++;
                z1/=10;
            }
            printf("%d*%d=%d\n",x,y,z);
            printf("%d\n",2+x2+y2+z2);
            z2=x2=y2=0;
            break;

        }
    }

    else
    {
        h=h-'1'+1;
        scanf("%d %d",&x,&y);
        int a,s=0;
    while(x!=0)
    {
        a=x%10;
        x=x/10;
        s=10*s+a;
    }
    s=s*10+h;
    while(s!=0)
    {
        a=s%10;
        s=s/10;
        x=10*x+a;
    }
    switch(m)
        {
            case'a':

            x1=x;
            y1=y;
            z=x+y;
            z1=z;
            if(x1<=0)
            x2++;
            if(y1<=0)
            y2++;
            if(z1<=0)
            z2++;
            while (x1)
            {
                x2++;
                x1/=10;
            }
            while (y1)
            {
                y2++;
                y1/=10;
            }
            while (z1)
            {
                z2++;
                z1/=10;
            }
            printf("%d+%d=%d\n",x,y,z);
            printf("%d\n",2+x2+y2+z2);
            z2=x2=y2=0;
            break;
        case 'b':
            x1=x;
            y1=y;
            z=x-y;
            z1=z;
            if(x1<=0)
            x2++;
            if(y1<=0)
            y2++;
            if(z1<=0)
            z2++;
            while (x1)
            {
                x2++;
                x1/=10;
            }
            while (y1)
            {
                y2++;
                y1/=10;
            }
            while (z1)
            {
                z2++;
                z1/=10;
            }
            printf("%d-%d=%d\n",x,y,z);
            printf("%d\n",2+x2+y2+z2);
            z2=x2=y2=0;
            break;
        default:
            x1=x;
            y1=y;
            z=x*y;
            z1=z;
            if(x1<=0)
            x2++;
            if(y1<=0)
            y2++;
            if(z1<=0)
            z2++;
            while (x1)
            {
                x2++;
                x1/=10;
            }
            while (y1)
            {
                y2++;
                y1/=10;
            }
            while (z1)
            {
                z2++;
                z1/=10;
            }
            printf("%d*%d=%d\n",x,y,z);
            printf("%d\n",2+x2+y2+z2);
            z2=x2=y2=0;

        }
    }}}