06-control-flow.dcf

来自「用Java实现的编译器。把源代码编译成SPARC汇编程序」· DCF 代码 · 共 39 行

class Program
{
    void main()
    {
        int i, sum;

        while (i < 10) {
            sum = sum + i;
            i = i + 1;
        }

        if (sum != 45) {
            callout("printf", "ERROR: while loop is bad (1)\n");
        }

        i = 11;
        
        while(i < 10) {i = i + 1;}

        if (i != 11) {
            callout("printf", "ERROR: while loop is bad (2)\n");
        }            

        if (1 > 2) {
            callout("printf", "ERROR: true branch is bad (2)\n");
        } else {
            // don't do anything here
        }            

        if (1 < 2) {
            // don't do anything here
        } else {
            callout("printf", "ERROR: else branch is bad (2)\n");
        }

        callout("printf", "control flow OK if no previous output\n");
    }
}