C language expert help me revise the !!! Thank you!!

You can use the mkdir() function to create a new folder and modify it on the basis of the original program as follows:

#include

#include

#include

void main()

int i;

file *fs;

char filename[20],dir[40];

i=1;mkdir("d:\\123");*If d: 123 does not exist, it establishes, and if it exists, it returns 0*

mkdir("d:\\123\\456");*If d: 123 456 does not exist, it is established, and if it exists, it returns 0*

strcpy(dir,"d:\\123\\456\\");

printf("Please enter the name of the file you want to save:");

scanf("%s",filename);

strcat(filename,".txt");

fs=fopen(strcat(dir,filename),"w");

while(i<=10)

printf("%d",i);

fprintf(fs,"%d",i);

i=i+1;

fclose(fs);

system("pause");

The square of the radius is equal to 12 and the area is 12*

It is not judged mathematically.

Rather, judge first.

c>b is true, and this part has a value of 1

And then judge. 1> aa is 1, so the judgment is not valid The result is 0

So choose A

Dude,That **program is obviously a wrong way to write,There is no output data at all,And you have made it clear when defining the parameters,So the result of data output without any additional definition of values is bound to be 0,I hope you re-check the content of the description of the numerical definition and parameter output part of the book,This can not only strengthen your memory,You can also understand what you are wrong!

Too complicated to judge. What do you not understand. But the problem is, of course, if the following judgment and t t = 1, u = 12, = 13, = 20, x = 13, y = 23 and z = 2

T = 1, U = 12, v = 14, w = 20, x = 13, y = 22, z = 1

t = 1，u = 12，v = 14，w = 20，x = 13，y = 23，z = 2

t = 1, u = 12, v = 14, = 21, x = 13, y = 20, z = 1.

T = 1, u = 12, = 14, w = 21, x = 13, y = 21, z = 2

When t = 1, u = 12, v = 14, w = 21, x = 13, y = 22, z = 3

t = 1, u = 12, v = 14, w = 21, x = 13, y = 23 and z = 4

t = 1, u = 12, = 14, = 21, x = 14, y = 24, z = 1.

T = 1, U = 12, v = 15, = 20, x = 13, y = 22, z = 1.

T = 1, U = 12, V = 15, = 20, X = 13, Y = 23, Z = 2

When t = 1, u = 12, v = 15, w = 21, x = 13, y = 20, z = 1

T = 1, U = 12, v = 15, = 21, x = 13, Y = 21 and Z = 2

At t = 1, U = 12, v = 15, = 21, x = 13, y = 22 and z =

At t = 1, you = 12, v = 15, w = 21, x = 13, y = 23, z = 4

T = 1, U = 12, V = 15, W = 21, = 14, Y = 24, Z = 1.

T = 1, u = 12, = 15, w = 22, x = 14, y = 22, z = 1

T = 1, U = 12, = 15, Watt = 22, x = 14, Y = 23 and Z = 2

t = 1, u = 12, = 15, w = 22, x = 14, y = 24, z = 3.

Change the result after tuvxy = 1 2 3 4 5, no one satisfies tons