c - 当用户输入不正确的值以避免程序崩溃时，C 中的数据验证

Question

如何确保用户只输入一个整数值以使程序不会崩溃？

如果用户输入的不是整数，我想:printf("请重新检查您的输入);

printf("How many values do you want to enter? \t");
    int g;
    scanf("%d", &g);

Answer 1

我会说，检查 scanf 的返回值:

These functions return the number of input items successfully matched and assigned, which can be fewer than provided for, or even zero in the event of an early matching failure.

The value EOF is returned if the end of input is reached before either the first successful conversion or a matching failure occurs. EOF is also returned if a read error occurs, in which case the error indicator for the stream (see ferror(3)) is set, and errno is set indicate the error.