error: ‘for’ loop initial declarations are only allowed in C99 mode
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error: ‘for’ loop initial declarations are only allowed in C99 mode
note: use option -std=c99 or -std=gnu99 to compile your code
这是因为在gcc中直接在for循环中初始化了变量i:
for(int i=0; i<len; i++) { }
需要改成如下代码,得先定义变量i
int i; for(i=0;i<len;i++){ }
或者换成C99标准就可以在for循环内定义i变量了:
gcc src.c -std=c99 -o src
0 0
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