How can we take input from a file and print output in the file in C programming?

Question

Write a C code for the logic -
input: string, strong
output: strng

Answer 1

try this method,
1. freopen("NameOfInputFile.in","r",stdin); // set input file in read mode and from this file in a particular format the compiler will read all inputs and
2. freopen("NameOfOutputFile.out","w",stdout); // print output in this .out file.
Use both of them like:

int main()
{
 freopen("NameOfInputFile.in","r",stdin); 
 freopen("NameOfOutputFile.out","w",stdout); 
 // start code here 
.
.
.
return 0;
}