C:\Users\lenovo\Documents\Untitled2.c||In function `main':|
C:\Users\lenovo\Documents\Untitled2.c|9|error: 'for' loop initial declaration used outside C99 mode|
C:\Users\lenovo\Documents\Untitled2.c|13|error: 'for' loop initial declaration used outside C99 mode|
||=== Build finished: 2 errors, 0 warnings ===|

把变量定义挪到外面就行了

编译参数增加 -std=c11 或 -std=c99

谢谢