for loop initial declarations are only allowed in c99 or c11 mode

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for loop initial declarations are only allowed in c99 or c11 mode

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#1 by (6 votes)

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How do I resolve the following error?

[Error] 'for' loop initial declarations are only allowed in C99 or C11 mode

(I use the C compiler: Dev ++ ).

c

asked by ezz 27.05.2017 в 23:45

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Add integers of an array in python System.Data.SqlClient.SqlException: 'Incorrect syntax near the keyword' OF '.'

score 6 · Answer 1

Starting with the C99 standard you can initialize a countable variable inside the for loop for easy reading and delimit its scope, but if the compatibility with this standard is not activated, this functionality can not be used.

So a loop in which the variable is defined and used in the same for :

for (int i = 0; i < N; i++) { ... }

You must change it by a previous definition and later use of the variable in for :

int i;
for (i = 0; i < N; i++) { ... }

Either we will have to activate the compatibility in the compiler using the following modifier the configuration of additional parameters (if it is gcc / MinGW GCC ) in "Tools" > "Compiler Options" > "Add the following commands when calling the compiler":

-std=c99