How to input a string using char in the C language?

In C language, you can use character arrays to input strings. The specific steps are as follows:

1. Declare a character array to store the input string. The size of the array should be determined based on the actual needs, for example, you can declare a character array of size 100 to store shorter strings.

char str[100];

1. To receive input strings using the scanf function without causing buffer overflow, use the %s format specifier with the qualifier %Ns, where N is the size of the character array minus one.

scanf("%99s", str);

1. The input string will be assigned to the character array ‘str’ and automatically have a null character ‘\0’ added to the end as the end marker of the string.

Here is the complete sample code:

#include <stdio.h>

int main() {
    char str[100];
    printf("请输入一个字符串：");
    scanf("%99s", str);
    printf("输入的字符串是：%s\n", str);
    return 0;
}

When running the program, users will be prompted to input a string, which will then be printed out.