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cannot convert from 'double' to 'float [6][3]'
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Using this code:
Fees = ovrh + (wr * z);
I am getting the following error:
error C2440: '=' : cannot convert from 'double' to 'float [6][3]'
Fees, ovrhd, wr and z are all declared as float. I believe if I can figure out what the problem is, I will have a functioning program. After several days straight of this program, I believe that I may be forgetting something basic.
Fees = ovrh + (wr * z);
I am getting the following error:
error C2440: '=' : cannot convert from 'double' to 'float [6][3]'
Fees, ovrhd, wr and z are all declared as float. I believe if I can figure out what the problem is, I will have a functioning program. After several days straight of this program, I believe that I may be forgetting something basic.
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Join Date: Apr 2004
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Could you show more of the code? Specifically the actual declarations for the variables would be helpful. I find no such issue with this minimal code sample.
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"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
The calculation of two floats yields a double. Compilers often WARN about converting from double to float because of a possible loss of precision.
YOUR error code sure sounds like you have an ARRAY of floats like
float fees[6][3];
fees = 1.0 * 2.0; // error double to float [6][3]
YOUR error code sure sounds like you have an ARRAY of floats like
float fees[6][3];
fees = 1.0 * 2.0; // error double to float [6][3]
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Slight nitpick:
Those aren't two floats (1.0 and 2.0), they're two doubles.
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Originally Posted by Chainsaw
The calculation of two floats yields a double.
C Syntax (Toggle Plain Text)
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
The purpose of the program is to store shipping costs in an array and then display them on the screen, in a formatted output.
Here are the declarations:
float Fees [6][3];
float i, j;
int wr, z;
const double ovrh = 2.27; // I tried to enter this as a const float, but the compiler didn't like it, so I changed it to a double which solved that one problem.
The assignment is 4 days late, so I am going to just turn it in as it. I would still like to see it work though. Thank you so much for your help!
Here are the declarations:
float Fees [6][3];
float i, j;
int wr, z;
const double ovrh = 2.27; // I tried to enter this as a const float, but the compiler didn't like it, so I changed it to a double which solved that one problem.
The assignment is 4 days late, so I am going to just turn it in as it. I would still like to see it work though. Thank you so much for your help!
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Originally Posted by Dave Sinkula
Could you show more of the code? Specifically the actual declarations for the variables would be helpful. I find no such issue with this minimal code sample.
C Syntax (Toggle Plain Text)
The purpose of the program is to store shipping costs in an array and then display them on the screen, in a formatted output.
Here are the declarations:
float Fees [6][3];
float i, j;
int wr, z;
const double ovrh = 2.27; // I tried to enter this as a const float, but the compiler didn't like it, so I changed it to a double which solved that one problem.
The assignment is 4 days late, so I am going to just turn it in as it. Thank you so much for your help!
Here are the declarations:
float Fees [6][3];
float i, j;
int wr, z;
const double ovrh = 2.27; // I tried to enter this as a const float, but the compiler didn't like it, so I changed it to a double which solved that one problem.
The assignment is 4 days late, so I am going to just turn it in as it. Thank you so much for your help!
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Originally Posted by Chainsaw
The calculation of two floats yields a double. Compilers often WARN about converting from double to float because of a possible loss of precision.
YOUR error code sure sounds like you have an ARRAY of floats like
float fees[6][3];
fees = 1.0 * 2.0; // error double to float [6][3]
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Aha! So your original statement was not entirely accurate. Fees is declared as an array of an array of float -- this is not the same and your compiler was kindly informing you of this. A single float might be Fees[0][0]. Try this (I'm assuming i and j are loop indices -- except that then they must be integral types and not floating point, but I'm used to i and j as loop indices -- and this is inside these loops.
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Fees, ovrhd, wr and z are all declared as float.
C Syntax (Toggle Plain Text)
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
Ah HAH! As I suspected.
Dave, you are right that '1.0' is a double. However, I still believe that two floats used in a calculation result in a double, in the same way that two chars used in a calculation result in an int. In any case, the compiler can deal with that and generally puts out a warning, not an error.
Dave, you are right that '1.0' is a double. However, I still believe that two floats used in a calculation result in a double, in the same way that two chars used in a calculation result in an int. In any case, the compiler can deal with that and generally puts out a warning, not an error.
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Originally Posted by Chainsaw
Ah HAH! As I suspected.
Dave, you are right that '1.0' is a double. However, I still believe that two floats used in a calculation result in a double, in the same way that two chars used in a calculation result in an int. In any case, the compiler can deal with that and generally puts out a warning, not an error.
const double ovrh = 2.27; "One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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Oops. I didn't read the comment. It makes me curious -- tnorton: are you saying that the compiler barked about something like this? But the other stuff about the promotions should be correct.
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// I tried to enter this as a const float, but the compiler didn't like it, so I changed it to a double which solved that one problem
C Syntax (Toggle Plain Text)
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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