2
void main()
{
char in;
scanf("%c",&in);
printf("%c %c %c",('a' + (in - 'A' ) - 1),('a' + (in - 'A')('a' + (in - 'A' ) + 1));
}
3
#include
void mian()
{
int a,b,sum;
srand( (unsigned int)time(0) );
a = rand();
b = rand();
printf(" %d + %d = ",a,b);
scanf("%d",&sum);
if( sum == a+b)
printf(" good ");
else
printf(" come on! ");
}
头文件 我只加了部分！
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