C help needed!

Question

Hey guys! I am having a little problem with a C program. I was writing a program to look through an array of numbers to see if a pair existed and it works except for one small issue... If you ask it for a sum where one of the addends is the number at the 0 index it doesn't recognize it as a pair that equals the sum for some reason. I printed out the contents of addend 1 and 2 and there appears to be some kind of garbage at that position in the index for some reason.

https://code.sololearn.com/cb1m80V20CO3/?ref=app

Answer 1

You only allocated a single character to read your input string so it over wrote your other data. Change char inputSum; to char inputSum[20];

Answer 2

You stated you have 4 characters allocated for the input due to sizeof(int). Since you only had one, typing anything was going to overwrite something.

fgets reads a string so say you enter 14 at the prompt. It would be 3 characters because strings end with a '\0' character. Your sizeof(int) parameter should be changed to sizeof(inputSum).

Answer 3

Hey it worked! Thank you! So if im understanding what your saying correctly, the issue was that I was trying to read an integer into a char and I was experiencing some overflow because I did not have enough memory allocated to hold a value of size int?