What does eof mean in c language

eof represents the end of file character in C language. In the while loop, EOF is used as the end-of-file mark. The file with EOF as the end-of-file mark must be a text file. In text files, data is stored in the form of character ASCII code values.

In C language, or more precisely in the C standard function library, it represents the end of file (end of file).

In the while loop, EOF is used as the end-of-file mark. The file with EOF as the end-of-file mark must be a text file. In text files, data is stored in the form of character ASCII code values. We know that the range of ASCII code values ​​is 0~127, and -1 is impossible, so EOF can be used as the end of file mark.

Example:

C language, input multiple sets of data, two per line, and then output one result corresponding to each line. Question description: Find the sum of integers a and b.

Input:

The test case has multiple lines, each line contains the value of a and b.

Output:

Output multiple lines, corresponding to the results of a b.

Sample input: 1 2

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Code example:

#include<stdio.h>
int main()
{
    int a,b,c;
    while(scanf("%d %d\n",&a,&b)!=EOF)//此处应用了EOF
    {
    printf("%d\n",a+b);
        
    }
    return 0;
}

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