doc: Update c.md (#418)

代码 printf("%p\n", \&myAge); 中,符号\有语法错误
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Fan 2023-08-21 08:34:24 +08:00 committed by GitHub
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@ -443,7 +443,7 @@ int* ptr = &myAge; // 名为 ptr 的指针变量,用于存储 myAge
printf("%d\n", myAge); // 输出 myAge (43) 的值
printf("%p\n", \&myAge); // 输出 myAge 的内存地址0x7ffe5367e044
printf("%p\n", &myAge); // 输出 myAge 的内存地址0x7ffe5367e044
printf("%p\n", ptr); // 用指针0x7ffe5367e044输出myAge的内存地址
```