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#include?

#include?

int?main(){

int?mark=0,falut=0;

float?answer=0,k=1;

char?m;

int?n;

int?i=1;

float?timu(char?q);

float?re(float?a,float?b,char?h);

printf("please?input?the?number?of?the?question?you?want?to?answer?and?the?type?of?the?question.\n");

scanf("%d,%c",&n,&m);

lp:{?k=timu(m);

scanf("%f",&answer);

if(k==answer)?{printf("you?are?right.\n");mark++;}

else?{printf("you?are?wrong.the?answer?is?%f\n",k);falut--;}

i++;

if(i<=n)?goto?lp;}

if(falut==0)?printf("\nyou?are?perfect.");

if(falut<0)printf("\n?There?is?%d?wrong,there?is?%d?right.",abs(falut),mark);

}

float?timu(char?q){

float?k,l;

k=abs(abs(rand())%3);

l=abs(abs(rand())%8+7);

printf("%f%c%f=",k,q,l);

return(re(k,l,q));}

float?re(float?a,float?b,char?h){

switch(h){

case?'+':return(a+b);

case?'-':return(a-b);

case?'*':return(a*b);

case?'/':return(a/b);

}

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