Lab 3-2, Shenzhen middle school 32 experimental classes

Lab 3-2, Shenzhen middle school 32 experimental classes

# Include <stdio. h>
# Include <stdlib. h>
# Include <time. h>
Main ()
{
Int a, B, c, n, u, I, e = 0;
Int sum2 = 1;
Int sum = 0;
Float sum3 = 0;
Float answer2;
Int resultTrue = 0;
Int answer;
Int time = 0;
Char op, op2;
Do // generate a random number
{
A = rand () % 100 + 1;
B = rand () % 100 + 1;
C = rand () % 100 + 1;
N = rand () % 4 + 1;
U = rand () % 9 + 1;
E = rand () % 10 + 1;
Switch (n)
{
Case 1: // contains an operator
{
Switch (u % 4) // generate the operator
{
Case 0:
{
Op = '+ ';
Break;
}
Case 1:
{
Op = '-';
Break;
}
Case 2:
{
Op = '*';
Break;
}
Case 3:
{
Op = '/';
Break;
}
}
Printf ("% d % c % d = \ n", a, op, B); // print
Switch (op) // calculate the answer using the operator
{
Case '+ ':
{
ResultTrue = a + B;
Break;
}
Case '-':
{
ResultTrue = a-B;
Break;
}
Case '*':
{
ResultTrue = a * B;
Break;
}
Case '/':
{
Sum3 = (float) a/B;
Printf ("enter the correct answer (two minutes ):");
Scanf ("% d", & answer2 );
If (sum3 = answer2)
{
Printf ("correct answer \ n ");
}
Else
{
Printf ("Incorrect answer \ n ");
Printf ("correct answer: % f \ n", sum3 );
}
Break;
}
}
While (time <1, 121)
{
Printf ("enter the correct answer (two minutes ):");
For (I = 0; I <121; I ++)
{
Time ++;
Scanf ("% d", & answer );
If (time = 120)
{
Printf ("time is up, cannot answer \ n ");
Time = 0;
Break;
}
If (time <1, 120)
{
If (answer = resultTrue)
{
Printf ("correct answer \ n ");
Printf ("the answer time is % d \ n", time );
Time = 0;
Break;
}
Else
{
Printf ("Incorrect answer \ n ");
Printf ("the answer is % d \ n", resultTrue );
Break;
}
}
}
}
}
Case 2: // generate two operators
{
Switch (u % 4) // The First operator is generated
{
Case 0:
{
Op = '+ ';
Break;
}
Case 1:
{
Op = '-';
Break;
}
Case 2:
{
Op = '*';
Break;
}
Case 3:
{
Op = '/';
Break;
}
}
Switch (u % 4) // produced by the second operator
{
Case 0:
{
Op2 = '+ ';
Break;
}
Case 1:
{
Op2 = '-';
Break;
}
Case 2:
{
Op2 = '*';
Break;
}
Case 3:
{
Op2 = '/';
Break;
}
}
Printf ("% d % c % d = \ n", a, op, B, op, c); // print
Switch (op) // calculate the answer first using the first operator
{
Case '+ ':
{
Sum = a + B;
Break;
}
Case '-':
{
Sum = a-B;
Break;
}
Case '*':
{
Sum = a * B;
Break;
}
Case '/':
{
Sum3 = (float) a/B;
Break;
}
}
Switch (op2) // then calculated based on the second operator
{
Case '+ ':
{
Sum = sum + c;
Break;
}
Case '-':
{
Sum = sum-c;
Break;
}
Case '*':
{
Sum = sum * c;
Break;
}
Case '/':
{
Sum3 = (float) sum3/c;
Printf ("enter the correct answer (two minutes ):");
Scanf ("% d", & answer2 );
If (sum3 = answer2)
{
Printf ("correct answer \ n ");
}
Else
{
Printf ("Incorrect answer \ n ");
Printf ("correct answer: % f \ n", sum3 );
}
Break;
}
}
While (time <123) // time setting
{
Printf ("enter the correct answer (two minutes ):");
For (I = 0; I <123; I ++)
{
Time ++;
Scanf ("% d", & answer );
If (time = 120)
{
Printf ("time is up, cannot answer \ n ");
Time = 0;
Break;
}
If (time <1, 120)
{
If (answer = sum)
{
Printf ("correct answer \ n ");
Printf ("Your Answer time is % d \ n", time );
Time = 0;
Break;
}
Else
{
Printf ("Incorrect answer \ n ");
Printf ("the answer is % d \ n", sum );
Break;
}
}
}
}
}
Case 3:
{
Printf ("Enter % d! = ", E );
Scanf ("% d", & answer );
For (I = 1; I <= e; I ++)
{
Sum2 = sum2 * I;
}
While (time <1, 121)
{
If (time = 120)
{
Time = 0;
Printf ("reached time \ n ");
Break;
}
If (time <1, 120)
{
If (answer = sum2)
{
Printf ("correct answer \ n ");
Printf ("% d \ n", time );
Sum2 = 1;
Break;
}
Else
{
Printf ("Incorrect answer \ n ");
Printf ("the answer is % d \ n", sum2 );
Sum2 = 1;
Break;
}
}
}
}
}
} While (1 );
}