Repeat loop from beginning until new numbers breaks and loop again in c-CodePudding

so I'm confused about how to solve this problem in C. The answer to this question is more likely solve if I can understand the logic. But it seems I cant understand it. Sorry if the question title does not matches the explanation of the problem. So:

In C, loop with using for like this, for(x=0;x<10;x ) , this will result to loop simultaneously without a break. For example:

for(x=0;x<10;x  )
printf("this is x = %d",x);

result example:

this is x = 0
this is x = 1
.
.
this is x = 10

So how to loop, but will break in each new number and start over then break/pause until new numbers and so on. For example:

for(x=0;x<//variables;x  )
printf("this is x = %d",x);

result:

(start)
this is x = 0
this is x = 1
(over/break)

(start)
this is x = 0
this is x = 1
this is x = 2
(over/break)

(start)
this is x = 0
this is x = 1
this is x = 2
this is x = 3
(over/break)

.
.
.

(start)
this is x = 0
this is x = 1
this is x = 2
this is x = 3
.
.
.
this is x = 10
(over/break)

So how to do this? This maybe seems simple but I can't find the solution. I hope the explanation can make the problem clear. Thank you.

CodePudding user response：

Just use nested for loops as for example

for ( int i = 0; i < 10;   i )
{
    for ( int x = 0; x  <= i   1;   x )
    {
        printf( "this is x = %d\n", x );
    }
}

Here is a demonstration program

#include <stdio.h>

int main( void ) 
{
    for ( int i = 0; i < 10;   i )
    {
        for ( int x = 0; x  <= i   1;   x )
        {
            printf( "this is x = %d\n", x );
        }
    }    
}

Its output is

this is x = 0
this is x = 1
this is x = 0
this is x = 1
this is x = 2
this is x = 0
this is x = 1
this is x = 2
this is x = 3
this is x = 0
this is x = 1
this is x = 2
this is x = 3
this is x = 4

and so on.

If you want to separate outputs with a blank line like

this is x = 0
this is x = 1

this is x = 0
this is x = 1
this is x = 2

this is x = 0
this is x = 1
this is x = 2
this is x = 3

this is x = 0
this is x = 1
this is x = 2
this is x = 3
this is x = 4
...

then write the loops like

for ( int i = 0; i < 10;   i )
{
    for ( int x = 0; x  <= i   1;   x )
    {
        printf( "this is x = %d\n", x );
    }
    putchar( '\n' );
}

If you want to use only one for loop then the program can look for example the following way

#include <stdio.h>

int main( void ) 
{
    for ( int x = 0, i = x   1;  i <= 10;  )
    {
        printf( "this is x = %d\n", x );
        if ( x == i )
        {
            putchar( '\n' );
              i;
            x = 0;
        }
        else
        {
              x;
        }
    }    
}

CodePudding user response：

Just us 2 for loops instead of 1:

for (y = 0; y < 10; y  )
    for (x = 0; x < y; x  )
        printf("this is x = %d",x);

If you wan't to change the maximum number, just change the value in the condition of the first loop (y < 10).

CodePudding user response：

two loops, the outer one increments the maximum number to count up to for the inner loop.