//程式如下，加法 減法各25道

#include

#include

#include

void main()

{

int i,a,b,c,score=0;

srand((unsigned)time(NULL));

for(i=1;i

{ a=rand()%89+10;

b=rand()%89+10;

c=rand()%198;

if(i

{

printf("%d+%d=%d\n",a,b,c);

if(c==a+b)

{printf("正確!\n");

score+=2;

}

else

printf("錯誤!\n");

}

else

{

printf("%d-%d=%d\n",a,b,c);

if(c==a-b)

{printf("正確!\n");

score+=2;

}

else

printf("錯誤!\n");

}

}

printf("總分為:%d\n",score);

}