error: 'for' loop initial declarations are only allowed in C99 mode
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原文地址:http://blog.csdn.net/imyang2007/article/details/8296331
使用gcc编译代码是报出
error: 'for' loop initial declarations are only allowed in C99 mode
note: use option -std=c99 or -std=gnu99 to compile your code
错误,这是因为在gcc中直接在for循环中初始化了增量:for(int i=0; i<len; i++) {}
这语法在gcc中是错误的,必须先先定义i变量:
int i;for(i=0;i<len;i++){}这是因为gcc基于c89标准,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
- ‘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
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