Let printf be an external function with no arguments returning an integer. Let S be an enumeration with values x1 equal to 0 and x2 equal to 1. Let main be a function returning an integer. It is called with no arguments. To perform the function, let S be a structure with member abdd, where abdd is an integer. Let j be a S structure. Let i be an integer, whose initial value is enumeration x1. Perform block 1, starting at case i, or the default case if no such case exists. To perform block 1, first let this be the start of case 1. Let this be the start of case 2. Pass the string "%d\n" and 45 to printf. Then let this be the start of the default case. Pass the string "%d\n" and 45 to printf. Next, compute nothing. After that, compute nothing. This ends block 1. Continuing on, we next perform block 2 provided zero does not equal i. To perform block 2, pass the string "%d\n" and i to printf. Continuing on, we next continue to perform block 3 as long as zero does not equal i before decrementing i by one at the beginning of the iteration. To perform block 3, evaluate 2. Continuing on, we next continue to compute nothing as long as zero does not equal i prior to the iteration; before starting this loop, evaluate i; upon completion of each iteration of the loop, increment i by one. Then continue to perform block 4 as long as zero does not equal i at the end of the iteration. To perform block 4, evaluate 3.