#include <stdio.h>
int main ()
{
int a, b;
for (a = 9; a > 0; a--)
for (b = 1; b <= 4; b++)
printf ("%d\n",b);
system ("pause");
return 0;
}
前头给int赋值没有任何意义,因为你在下头已经给他俩赋值了,在着你只要输出b的数前头的那个也没有意义
#include <stdio.h>
int main ()
{
int sum = 0;
int a = 1;
for (a = 1; a <= 100; a++)
sum = sum + a;
printf ("sum = %d\n", sum);
system ("pause");
return 0;
}