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I have to find the third and the fifth even element of the array A. But... I don't know why the program isn't working.

+2 votes
asked Nov 19, 2020 by Miafina (920 points)

This is a part of my code

for(int i=0; i<3; i++){
       for(int j=0; j<4; j++){
           if(A[i][j]%2==0){   
               n++;
           }
           if(n==3){
               p3=A[i][j];
               ip3=i;
               jp3=j;
           }
           if(n==5){
               p5=A[i][j];
               ip5=i;
               jp5=j;
           }
       }
       
And this is the result:
Compilation failed due to following error(s).main.c: In function main’:
main.c:20:22: error: invalid operands to binary % (have float and int’)
            if(A[i][j]%2==0){
               ~~~~~~~^

1 Answer

+2 votes
answered Nov 19, 2020 by xDELLx (7,960 points)
selected Nov 20, 2020 by Miafina
 
Best answer

Can you try below & see if the code works with below change.
Use a temp int variable to store data of the array element & use it in the if condition.

The compiler is complaining because ,I think the definition of A is float A[][].
Implying individual elements are float & using the modulo operator expects both int args.

 


 //...existing code here ie for loops
int temp = A[i][j];
 if(temp%2==0){
 n++;
 }
//...existing code here 
if(n==3){ 
//...
//...
}
if(n==5){ 
//...
//...
}
//...existing code here 

commented Nov 20, 2020 by Miafina (920 points)
Thank you! I've just changed float array to the int array and now it's all right!
commented Nov 20, 2020 by Peter Minarik (25,430 points)
Yes. That's what the error message said: "invalid operands to binary % (have ‘float’ and ‘int’)", that is, you're trying to use the modulo (%) operator on a floating point number. It only works on integral numbers.

Good job! ;)
commented Nov 20, 2020 by Miafina (920 points)
Thank you! I didn't know that before)
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