Loop through indexes in C

-2

I would like to look for values in an array that equal to 0 up to a certain index, but the function sets all my previous values to 0; instead of checking for 0s.

a is the specified index, and Mem is an array of size 100.

for(int i=0;i<a;i++){

    if (Mem[i]=0){

        printf("Error!n");

    }

}

I'm trying to check for 0s in an array up to a certain index.

If there are any, I need to output an error.

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

asked Nov 20 '18 at 19:22

user10158754

What makes you doubt the code? Any unwanted behaviour observed?

– Yunnosch
Nov 20 '18 at 19:24

Yeah, the function sets all my previous values to 0; instead of checking for 0s

– user10158754
Nov 20 '18 at 19:27

Do you want Mem[a] included in the check?

– Yunnosch
Nov 20 '18 at 19:27

1

And do you see any part of your code which does something like Mem[i]=0 ? (Caught me at reading lazily by the way ;-)

– Yunnosch
Nov 20 '18 at 19:28

1

For better future questions, please study the concept of making a Minimal, Complete, and Verifiable example.

– Yunnosch
Nov 20 '18 at 19:41

|
show 9 more comments

-2

I would like to look for values in an array that equal to 0 up to a certain index, but the function sets all my previous values to 0; instead of checking for 0s.

a is the specified index, and Mem is an array of size 100.

for(int i=0;i<a;i++){

    if (Mem[i]=0){

        printf("Error!n");

    }

}

I'm trying to check for 0s in an array up to a certain index.

If there are any, I need to output an error.

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

asked Nov 20 '18 at 19:22

user10158754

What makes you doubt the code? Any unwanted behaviour observed?

– Yunnosch
Nov 20 '18 at 19:24

Yeah, the function sets all my previous values to 0; instead of checking for 0s

– user10158754
Nov 20 '18 at 19:27

Do you want Mem[a] included in the check?

– Yunnosch
Nov 20 '18 at 19:27

1

And do you see any part of your code which does something like Mem[i]=0 ? (Caught me at reading lazily by the way ;-)

– Yunnosch
Nov 20 '18 at 19:28

1

For better future questions, please study the concept of making a Minimal, Complete, and Verifiable example.

– Yunnosch
Nov 20 '18 at 19:41

|
show 9 more comments

-2

I would like to look for values in an array that equal to 0 up to a certain index, but the function sets all my previous values to 0; instead of checking for 0s.

a is the specified index, and Mem is an array of size 100.

for(int i=0;i<a;i++){

    if (Mem[i]=0){

        printf("Error!n");

    }

}

I'm trying to check for 0s in an array up to a certain index.

If there are any, I need to output an error.

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

asked Nov 20 '18 at 19:22

user10158754

I would like to look for values in an array that equal to 0 up to a certain index, but the function sets all my previous values to 0; instead of checking for 0s.

a is the specified index, and Mem is an array of size 100.

for(int i=0;i<a;i++){

    if (Mem[i]=0){

        printf("Error!n");

    }

}

I'm trying to check for 0s in an array up to a certain index.

If there are any, I need to output an error.

c arrays

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

asked Nov 20 '18 at 19:22

user10158754

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

asked Nov 20 '18 at 19:22

user10158754

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

edited Nov 20 '18 at 19:40

Yunnosch

11.3k52033

asked Nov 20 '18 at 19:22

user10158754

asked Nov 20 '18 at 19:22

user10158754

asked Nov 20 '18 at 19:22

user10158754

What makes you doubt the code? Any unwanted behaviour observed?

– Yunnosch
Nov 20 '18 at 19:24

Yeah, the function sets all my previous values to 0; instead of checking for 0s

– user10158754
Nov 20 '18 at 19:27

Do you want Mem[a] included in the check?

– Yunnosch
Nov 20 '18 at 19:27

1

And do you see any part of your code which does something like Mem[i]=0 ? (Caught me at reading lazily by the way ;-)

– Yunnosch
Nov 20 '18 at 19:28

1

For better future questions, please study the concept of making a Minimal, Complete, and Verifiable example.

– Yunnosch
Nov 20 '18 at 19:41

|
show 9 more comments

What makes you doubt the code? Any unwanted behaviour observed?

– Yunnosch
Nov 20 '18 at 19:24

Yeah, the function sets all my previous values to 0; instead of checking for 0s

– user10158754
Nov 20 '18 at 19:27

Do you want Mem[a] included in the check?

– Yunnosch
Nov 20 '18 at 19:27

1

And do you see any part of your code which does something like Mem[i]=0 ? (Caught me at reading lazily by the way ;-)

– Yunnosch
Nov 20 '18 at 19:28

1

For better future questions, please study the concept of making a Minimal, Complete, and Verifiable example.

– Yunnosch
Nov 20 '18 at 19:41

What makes you doubt the code? Any unwanted behaviour observed?

– Yunnosch
Nov 20 '18 at 19:24

Yeah, the function sets all my previous values to 0; instead of checking for 0s

– user10158754
Nov 20 '18 at 19:27

Do you want Mem[a] included in the check?

– Yunnosch
Nov 20 '18 at 19:27

And do you see any part of your code which does something like Mem[i]=0 ? (Caught me at reading lazily by the way ;-)

– Yunnosch
Nov 20 '18 at 19:28

For better future questions, please study the concept of making a Minimal, Complete, and Verifiable example.

– Yunnosch
Nov 20 '18 at 19:41

|
show 9 more comments

2 Answers
2

active

oldest

votes

if (Mem[i]=0)
is assigning 0 to each Mem[i].

You are effectively writing 0 to every element of the array.

You need to use the == comparison operator
i.e if (Mem[i] == 0)

Other than that, you have the right idea.

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:29

64bitFrog

362

thank you, that sorted it!

– user10158754
Nov 20 '18 at 19:31

Quite nice work for what seems to be your first answer. Check out formatting options for future answers and have fun.

– Yunnosch
Nov 20 '18 at 19:37

add a comment |

Try below code:

for(int i=0;i<a;i++){

    if (Mem[i]==0){

        printf("Error!n");

    }

}

The = operator is for assigning a value to a variable.

But == is a comparison operator for logical expressions.

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

if (Mem[i]=0)
is assigning 0 to each Mem[i].

You are effectively writing 0 to every element of the array.

You need to use the == comparison operator
i.e if (Mem[i] == 0)

Other than that, you have the right idea.

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:29

64bitFrog

362

thank you, that sorted it!

– user10158754
Nov 20 '18 at 19:31

Quite nice work for what seems to be your first answer. Check out formatting options for future answers and have fun.

– Yunnosch
Nov 20 '18 at 19:37

add a comment |

if (Mem[i]=0)
is assigning 0 to each Mem[i].

You are effectively writing 0 to every element of the array.

You need to use the == comparison operator
i.e if (Mem[i] == 0)

Other than that, you have the right idea.

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:29

64bitFrog

362

thank you, that sorted it!

– user10158754
Nov 20 '18 at 19:31

Quite nice work for what seems to be your first answer. Check out formatting options for future answers and have fun.

– Yunnosch
Nov 20 '18 at 19:37

add a comment |

if (Mem[i]=0)
is assigning 0 to each Mem[i].

You are effectively writing 0 to every element of the array.

You need to use the == comparison operator
i.e if (Mem[i] == 0)

Other than that, you have the right idea.

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:29

64bitFrog

362

if (Mem[i]=0)
is assigning 0 to each Mem[i].

You are effectively writing 0 to every element of the array.

You need to use the == comparison operator
i.e if (Mem[i] == 0)

Other than that, you have the right idea.

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:29

64bitFrog

362

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

edited Nov 20 '18 at 19:34

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:29

64bitFrog

362

answered Nov 20 '18 at 19:29

64bitFrog

362

answered Nov 20 '18 at 19:29

64bitFrog

362

thank you, that sorted it!

– user10158754
Nov 20 '18 at 19:31

Quite nice work for what seems to be your first answer. Check out formatting options for future answers and have fun.

– Yunnosch
Nov 20 '18 at 19:37

add a comment |

thank you, that sorted it!

– user10158754
Nov 20 '18 at 19:31

Quite nice work for what seems to be your first answer. Check out formatting options for future answers and have fun.

– Yunnosch
Nov 20 '18 at 19:37

thank you, that sorted it!

– user10158754
Nov 20 '18 at 19:31

Quite nice work for what seems to be your first answer. Check out formatting options for future answers and have fun.

– Yunnosch
Nov 20 '18 at 19:37

add a comment |

Try below code:

for(int i=0;i<a;i++){

    if (Mem[i]==0){

        printf("Error!n");

    }

}

The = operator is for assigning a value to a variable.

But == is a comparison operator for logical expressions.

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

add a comment |

Try below code:

for(int i=0;i<a;i++){

    if (Mem[i]==0){

        printf("Error!n");

    }

}

The = operator is for assigning a value to a variable.

But == is a comparison operator for logical expressions.

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

add a comment |

Try below code:

for(int i=0;i<a;i++){

    if (Mem[i]==0){

        printf("Error!n");

    }

}

The = operator is for assigning a value to a variable.

But == is a comparison operator for logical expressions.

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

Try below code:

for(int i=0;i<a;i++){

    if (Mem[i]==0){

        printf("Error!n");

    }

}

The = operator is for assigning a value to a variable.

But == is a comparison operator for logical expressions.

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

edited Nov 20 '18 at 19:33

Yunnosch

11.3k52033

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

answered Nov 20 '18 at 19:31

Mohammadreza Panahi

2,66521433

add a comment |

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