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char zm; zm = zm - 'a' + 'A';//小写变大写 zm = zm - 'A' + 'a';//大写变小写
数组指针顾名思义，就是指向数组的指针。每个元素是一个一维数组int a[3] = {1,2,3}; int(* p)[n] = { }; *p[0] = ...
float jiecheng(int n) { int num; if (n==0 || n==1) { num = 1; } else { num = n * jiecheng(n-1); } return num; }
个位:x%10；十位:x/10%10；百位:x/100%10；千位:x/1000%10
webBenchmarkwget https://github.com/maintell/webBenchmark/releases/download/0.5/webBenchmark_linux_x64 chmod +x webBenchmark_linux_x64开始测压：官网命令 ./webBenchmark_linux_x64 -c [COUNT] -s [URL] -r [REF...
