Question

I am trying to get this code to verify that the user input a value. It works if i use gets() but when I change it to fgets() it stops working. I want it to keep looping until the user enters a string of at least 1 character but less than 25 I am new to programming if it isn’t apparent in my code. Thanks!

int main(void)
{
    char input[25], inputNew[25];
    int i;
    int x;
    int y;
    do
    {
        printf("Please enter a string less then 25 characters!\n");
        fgets(input, sizeof(input), stdin);  
        y = strlen(input);  
    }
    while(y>25 || y<=0);

    for (i = 0; i <= strlen(input); i++)
    {
        inputNew[i] = toupper(input[i]);
        for (x = 1; x <= strlen(input); x+=2)
        {
        inputNew[x] = tolower(input[x]);
        }
    }
    printf("The new value is: %s.\n", inputNew);
return 0;
}

Answer 1

fgets keeps the ending newline, whereas gets throws it out.

Therefore, you’ll have to change your check to y <= 1 if you use fgets.