using sprintf to print out stings on a LCD how can i use a percent sign in this function

Question

Hello I am new to most coding and i am writing code onto PSoC4 creator for PSoC 3 chip that uses sprintf to display a string to LCD but my function looks like

sprintf(line1Str,"Local T" );           //TOP row of LCD                        
sprintf(line2Str,"TL=%.1f", CurrentTemp ) //Bottom row of LCD

My problem is that i want to be able to display the % sign in this as well as floating point. I have tried the special character stuff like Char38 and so forth and leaving white space and such but it seams to skip when i have this style of format. can anyone help me?

actually njeeds 3 %. Two to get the % , one to get the float value — pm100, Jun 07 '17 at 21:24

score 1 · Answer 1 · answered Jun 07 '17 at 21:20

1

To display the % character in a string created or outputted by a printf-family function, use the %% escape sequence:

printf("Your grade is 100%% on this assignment\n");

Output:

Your grade is 100% on this assignment

See this page, particularly the last entry in the first table:

A % followed by another % character will write a single % to the stream.

answered Jun 07 '17 at 21:20

Govind Parmar

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Thanks I tried the double %% infront of it with the call to the float but not after thanks its working now much appreciated!! – Xanthius Jun 07 '17 at 21:24

gsamaras · Answer 2 · 2017-06-07T21:25:17.317

1

Use %% like this:

sprintf(line2Str,"TL=%%%.1f", CurrentTemp );

Note that need one percentage character for the float number as well.

edited Jun 07 '17 at 21:25

answered Jun 07 '17 at 21:21

gsamaras

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needs 3 not 2.. – pm100 Jun 07 '17 at 21:24
@GovindParmar see my update is that what you are saying? Nice answer BTW of yours. If you feel like it, I can delete mine. Yes that's it pm100, thanks! – gsamaras Jun 07 '17 at 21:26

using sprintf to print out stings on a LCD how can i use a percent sign in this function

2 Answers2