Question

if (srcbloc == NULL) {
    fprintf(stderr, "warning!: memrip source is null!\n");
    exit(1);
}
if (destbloc == NULL) {
    destbloc = malloc(len);
}
if (srcbloc == destbloc) {
    fprintf(stderr, "warning!: srcbloc = destbloc\n");
    exit(1);
}
if (offset < 0) {
    fprintf(stderr, "warning!: offset = %i\n", offset);
}
if (len < 0) {
    fprintf(stderr, "warning!: len = %i\n", len);
}

我想知道在运行这个程序时是否会测试所有if语句？

Answer 1

鉴于你的代码

if (srcbloc == NULL) { /* <-- if this block is entered then, */
  fprintf(stderr, "warning!: memrip source is null!\n"); 
  exit(1); /* <-- Program will exit */ 
}
if (destbloc == NULL) {  /* <-- Allocate destbloc of len length. */
  destbloc = malloc(len); 
}
if (srcbloc == destbloc) { /* <-- if this block is entered then, */
  fprintf(stderr, "warning!: srcbloc = destbloc\n"); 
  exit(1); /* <-- Program will exit */ 
}
if (offset < 0) { 
  fprintf(stderr, "warning!: offset = %i\n", offset); 
}
if (len < 0) { 
  fprintf(stderr, "warning!: len = %i\n", len); 
}

因此，如果(srcbloc == NULL)或(srcbloc == destbloc)程序将发出警告（并退出）。如果任何其他测试匹配警告将被打印，但程序将继续处理。

连续if语句流

1 个答案: