Compiling the following code using gcc-5.1.0 produces a warning:使用gcc-5.1.0编译以下代码会产生警告: warning: implicit declaration of function ‘abs’ [-Wimplicit-function-declaration] 1. Code:码: #include <stdio.h> #include <math.h> int main (void) { printf ("%d\n", abs (-1)); ...
warning: implicit declaration of function‘abs’ [-Wimplicit-function-declaration] Code: 码: #include <stdio.h> #include <math.h> int main (void) { printf ("%d\n", abs (-1)); return 0; } I have compiled the same code with gcc-4.9.2 and it's not producing any warning. 我...
gcc -Wimplicit -c test_implicit.c test_implicit.c:7: warning: return type defaults to `int’ test_implicit.c: In function `test’: test_implicit.c:18: warning: implicit declaration of function `sub’ [-Wmissing-braces] 当聚合类型或者数组变量的初始化表达式没有’充分’用括号{}括起时,给...
使用gcc编译c文件出现如下错误:getIP.c:14: warning: implicit declaration of function ‘gethostname’ getIP.c:20: warning: implicit declaration of function ‘getaddrinfo’ getIP.c:21: error: dereferencing pointer to incomplete type getIP.c:23: error: dereferencing pointer to incomplete type getI...
gcc -Wimplicit -c test_implicit.c test_implicit.c:7: warning: return type defaults to `int' test_implicit.c: In function `test': test_implicit.c:18: warning: implicit declaration of function `sub' [-Wmissing-braces] 当聚合类型或者数组变量的初始化表达式没有'充分'用括号{}括起时,给出警...
-Wimplicit-function-declaration (C and Objective-C only) -Wimplicit-int (C and Objective-C only) -Winfinite-recursion -Winit-self (C++ and Objective-C++ only) -Wint-in-bool-context -Wlogical-not-parentheses -Wmain (only for C/ObjC and unless -ffreestanding) ...
错误原因: 存在没配对的花括号或注解 /* */ #include int main (void) if (1) 5 printf (Hello World!/n); return 0; /* 花括号不匹配 */ parse error before printf 中文含义:在printf 之前解析错误 错误原因:在该语句之前缺少分号 ; warning: implicit declaration of function . 中文含义:警告:与 ...
warning: incompatible implicit declaration of built-in function ‘round’我对C已经生疏了,但是我认为#include把round()的声明带进了作用域我已经检查了我的ANSI标准(C99是我唯一的副本),它确认了round()函数存在于math.h头文件中。这里我漏掉了什么?编辑: Ubuntu上的编译器是GCC 4.3.2 (intrepid,IIRC)。...
incompatible implicit declaration of built-in function ‘malloc’ 上面這個 warning 訊息通常是因為忘了 #include 如果沒有引入 stdlib.h 也可以過,程式執行也正常,只是會有 warning wenchiching 因為上課的需求,我在 ubuntu9.10 安裝了 systemC 先到Open SystemC Initiative (OSCI) 下載 systemc-2.2.0.tgz ...
test_implicit.c: In function `test': test_implicit.c:18: warning: implicit declaration of function `sub' [-Wmissing-braces] 当聚合类型或者数组变量的初始化表达式没有'充分'用括号{}括起时,给出警告。文字表述很难理解,举例说明则清晰些。看下面的例子: ...