C code:
#include <stdio.h>
void main()
{
int i = 2;
int cc = -1;
cc = (3+4, 1-2, 5*2);
printf("cc = %d/n", cc);
}
运行结果:
cc = 10
注意:逗号表达式一定要加括号,要不然,表达式会被理解为:
1. cc = 3+4,
2. 1- 2,
3. 5*2
那样的话,cc始终等于3+4
C code:
#include <stdio.h>
void main()
{
int i = 2;
int cc = -1;
cc = (3+4, 1-2, 5*2);
printf("cc = %d/n", cc);
}
运行结果:
cc = 10
注意:逗号表达式一定要加括号,要不然,表达式会被理解为:
1. cc = 3+4,
2. 1- 2,
3. 5*2
那样的话,cc始终等于3+4