int i=1,s=3; do{ s+=i++; if(s%7==0) continue; else++i;} while(s

int i=1,s=3; do{ s+=i++; if(s%7==0) continue; else++i;} while(s
int i=1,s=3; do{ s+=i++; if(s%7==0) continue; else++i;} while(s

int i=1,s=3; do{ s+=i++; if(s%7==0) continue; else++i;} while(s
按顺序来：
s+=i++；//s = s+i得到s=4;i=2;
if(s%7==0) continue; //不满足,继续运行下一句
else ++i; //得到i = 3;
while(s