简单原则(Keep It Simple and Stupid)
if (system("ls")) {
// do something
}
if (system("ls") != 0) {
// do something
}
if (system(i > 0 ? "ls" : "ls -la") != 0) {
// do something
}
const char *cmdLine = i > 0 ? "ls" : "ls -la";
if (system(cmdLine) != 0) {
// do something
}