How to enter a string with spaces in C language

In C language, use gets(), fgets() and scanf() functions to input strings containing spaces. gets() reads until newline or EOF, fgets() requires a file pointer to be specified, and scanf() uses the %1%*c format specifier to read until newline. \n ↩

How to input a string containing spaces in C language

In C language, you can use The following method inputs a string containing spaces:

Method 1: Use gets() function

char str[100];
printf("请输入一个包含空格的字符串：");
gets(str);

Method 2: Use fgets() function

char str[100];
FILE *fp = fopen("input.txt", "r");
if (fp == NULL) {
    perror("打开文件失败");
    return -1;
}
fgets(str, 100, fp);
fclose(fp);

Method 3: Use scanf() function

char str[100];
printf("请输入一个包含空格的字符串：");
scanf("%[^\n]%*c", str);

Note:

• Use gets() function, be aware that it reads input until it encounters a newline character or EOF, so this may cause problems if the input string is very long.
• When using the fgets() function, you need to specify the file pointer.
• When using the scanf() function, you need to use the %¹%c format specifier, where %² will read until a newline character is encountered, %c will skip the newline character.

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