int main(int argc,char *argv[]) { char ch while(true) { printf("*************************************\n") printf(" 1.Reader Priority\n") printf(" 2.Writer Priority\n") printf(" 3.Exit to Windows\n") printf("*******

printf实现源码 操作系统底层的源码-printf souces code

C标准库源码，对于了解malloc、printf等库函数有很大帮助。-C standard library source code, for understanding malloc, printf and other library functions are very helpful.

ucos在mcs51上的移植，包括中断和printf打印功能-ucos mcs51