Question

How to check if scanf successfully takes 1 user input in C

Answer 1

#include <stdio.h>

int main()
{
    char buf[16] = "";

    printf("Enter a string: ");

    if (scanf("%s", buf) != 1) {
        fputs("Invalid input\n", stderr);
    }
    else {
        puts(buf);
    }

    return 0;
}



/*
run:

Enter a string: abcdef
abcdef

*/

 

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