There s a hollow trapezoidal C program that can t be written, so help

I don't understand too much, big brother! Give an example! For example, what is input, what is output...Come on! I'm not available if it's late!

Question 1 Procedure:

#include

void main()

printf("The number is: %d",sum);

Question 3: include

#define n 20

void main()

printf("%f",sum);

The fourth question is 9!If the ticket sample is not the same, it is 2*9!

Question 5: include

#define n 1000

void main()

printf("%d",sum);}

The program mainly has syntax errors and algorithm problems, the following is the correct answer after the actual combat on the machine, please refer to include

#include

void main()

printf("The string after the connection is:");

printf("%s",str3);

The last for loop is redundant, removed, and then the character array output format is changed to printf("%s",str3);Can.

It's always right, only the last two lines can be changed.

for(i=0;i<=len1+len2;i++)printf("%s",str3[i]);

It needs to be modified to:

for(i=0;i<=len1+len2;i++)printf("%c",str3[i]);

Or simply :

printf("%s",str3);

Can do it with arrays, here's the answer I copied from a book.

#include

void main()

Exponentiation!

If you want to represent a very small number, the easiest way to do this is to write it directly.

Or use the pow function, pow (base, exponent).

The idea is right, a little wrong in the details.

It is recommended that you practice again with the pointer, after all, the pointer is used more.

for loop nesting, it's simple! I knocked out the ** in three minutes, but I didn't connect to the Internet!

int a,b,c;

printf("Welcome to the childish program made by contemptible people, hehe, let's start the test! You ready? 1,yes 2,no ！");

scanf("%d",&a);

if(a==1) *The judgment is based on == instead of the assigned symbol =* else

printf("Forget it, I can't tell the gender apart, it's unexpected! ");

elseprintf("Then come back later! 886！");

printf("I wanted to write a long time, but I had time and patience with wood! Please forgive me for your understanding! Press Enter to return! ");

a==1 is the judgment, and a=1 is to assign a value.

vc 6 compiles passed.

#include

int main ()

Halo Where the parentheses should be enlarged, the parentheses must be enlarged, understand?

1 is the value of two numbers that are exchanged.

2 is the exchange pointer.

3 is a function, which involves the passing of parameters.

Program for 1: main().

Program 2: main().

Note that the values of a and b are unchanged at this time.

3 of the program. swap1( int * pa, int * pb )main()

Not bad! It's best to write a flowchart yourself.

It's very good for you, I personally think that being able to write a flowchart quickly is sometimes more important than typing, and it's a way to improve your problem-solving skills.

Can't be lazy.