Parallel-conjugate-gradient in C language

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I need this code in c language, I don't know the instructions of cpp language can anyone help me to convert Parallel-Conjugate-Gradient to c

What I have tried:

----

Posted 1-Mar-18 9:50am

Lilyanaa

Updated 5-Mar-18 9:29am

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CPallini · Answer 1 · 2018-03-01T11:26:00

Solution 1

Quote:
I don't know the instructions of cpp language

It's time to learn, then. You are lucky: that's very C-like code. You have basically to replace new/delete[^] calls with malloc/free ones, some output streams statements with corresponding C standard printf calls and very little else.

Posted 1-Mar-18 11:26am

CPallini

Comments

Rick York 1-Mar-18 17:34pm

Also the use of string and comparisons using those variables need to change.

It looks like a straight-forward task to me.

Lilyanaa 1-Mar-18 18:08pm

Ok, Now I'm trying

Lilyanaa 1-Mar-18 18:12pm

I have problem in this part can you help how can translate it to c
if(argc > 2) {
T = argv[2];
if(argc > 3) {
P = argv[3];
if(argc > 4) {
Db = argv[4];
}
}
}

CPallini 2-Mar-18 3:34am

You have to replace C++ strings with char pointers (char *).
For instance:
char * T;
//...
T = argv[2];
//..
if ( T && ( strcmp(T,"-p")==0)) // this replaces if (T == "-p")
//..

Lilyanaa 2-Mar-18 10:24am

Thank you so much, I have this error and to other files why? incompatible type for argument 2 of ‘fprintf’fprintf(matrixfile, a[i][j]); note: expected ‘const char * restrict’ but argument is of type ‘double’
extern int fprintf (FILE *__restrict __stream,

Lilyanaa 2-Mar-18 10:28am

I don't need to use file now, so I commented it, but I have this problem how can solve it, please/// ===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= PID 2173 RUNNING AT sara
= EXIT CODE: 11
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
YOUR APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault (signal 11)
This typically refers to a problem with your application.
Please see the FAQ page for debugging suggestions

Rick York 2-Mar-18 12:38pm

This means it's time to use the debugger.

Lilyanaa 4-Mar-18 16:23pm

@Rick York, think the problem in this part because when I comment it, the program run in correct way if(argc > 2) {
T = argv[2];
if(argc > 3) {
P = argv[3];
if(argc > 4) {
Db = argv[4];
}
}
}