如何在C中打印0个直角三角形？

Question

Pattern :

0
00
000
0000
00000
000000

#include<stdio.h>
int main()
{
 int value = 6;
 for(int i = 1; i < value+1; i++);
 {
  for(int j = 1; j <= i; j++);
   printf("0");
  printf("\n");
 }
 return 0;
}

And also the 1st row consists of 1 0's, the 2nd row 2 0's, and so on, until the Nth row, which consists of N zeroes. like below pattern.

0
00
000
0000
00000
000000

Note: I have to give positive integer N and print N rows.

MY ERRORS:

Program: In function 'main':
Program:7:21: error: 'i' undeclared (first use in this function)
Program:7:21: note: each undeclared identifier is reported only once for each function it appears in

Answer 1

You have a ; at the end of both of your for statements, this closes the for loop immediately, which means the i variable is then out of scope and unavailable for use.

Answer 2

In C don't declare, variables inside ( ) .

int i;  // declare globally
//  do your stuff
for(i = 1; i < value+1; i++)

If you put ; colon after loop statement, the loop blocks there itself till the condition fails. it will execute the next line. So remove the ; after for loops.

Try this-

#include<stdio.h>
int main()
{
        int value,i,j;
        printf("Enter the number of rows\n");
        scanf("%d",&value);
        printf("-----------------\n");
        for(i = 1; i < value+1; i++)
        {
                for(j = 1; j <= i; j++)
                printf("0");
                printf("\n");
        }
        return 0;
}

Answer 3

First remove the semicolon & remember for control structure you can not put semicolon at the end of it, so remove semicolon ,

Seceondly, if you are still getting error put your int i and j outside of for loop,