#include <string.h>
#include <stdlib.h>
#include <time.h>
int funtest(char cp[]) {
int ix = 0,iy = 0,ik = 0
char ca[20] = {'\0'},cb[20] = {'\0'}
// srand((unsigned)time(NULL))
strcpy(ca,cp)
ik = strlen(ca)
ix = rand()%ik
iy = rand()%ik
while(iy == ix) iy = rand()%ik
ca[ix] = '*'
ca[iy] = '*'
printf("The word is: %s.\n",ca)
printf("Please input correct word : ")
gets(cb)
return (strcmp(cb,cp) == 0)
}
void main() {
char cs[5][20] = {"beautiful","student","China","function","include"}
int i,ik = 0
srand((unsigned)time(NULL))
i = rand()%5
ik = funtest(cs[i])
if(ik) printf("Right!\n")
else printf("Wrong! The word is: %s\n",cs[i])
getchar()
}
第一个for循环，将a[0]到a[9]赋值为0~9a=0,1,2,3,4,5,6,7,8,9
第二个for循环，i=0 1 2
于是
p[0]
=a[0*(0+1)]
=a[0]
=0
p[1]
=a[1*(1+1)]
=a[2]
=2
p[2]
=a[2*(2+1)]
=a[6]
=6
第三个for循环 i=0 1 2
k+=p[0]*2=0*2=0
k=5+0=5
k+=p[1]*2=2*2=4
k=5+4=9
k+=p[2]*2=6*2=12
k=9+12=21
输出k为21
选B
