1 //第六题
 2 
 3 #include <stdio.h>
 4 
 5 int main (void){
 6     float x = 2.55;
 7     
 8     printf ("3x3 - 5x2 + 6 =%f\n", 3*x*3 - 5*x*2 + 6);
 9              
10     return 0;
11 }
 1 //第七题
 2 
 3 #include <stdio.h>
 4 
 5 int main (void){
 6     double  result;
 7 
 8     result = (3.31e-8 * 2.01e^-7) / (7.16e^-6 + 2.01e^-8);
 9     printf ("result = %g\n", result);
10 
11     return 0;
12 
13 } 
14 答案不对
 1 //第八题
 2 
 3 #include <stdio.h>
 4 
 5 int main (void){
 6     int i, j, Next_multiple;
 7     
 8     printf ("please enter number i:");
 9     scanf ("%i", &i);
10     printf ("please enter number j:");
11     scanf ("%i", &j);
12     Next_multiple = i + j - i % j;
13     printf ("the integer is %i.\n", Next_multiple);
14     
15     return 0;
16 }