Segmentation Fault 11 when adding two 2D arrays using structs

Question

I have been working on a program that does math on matrices, and decided to create a struct containing the information required to do the calculations:

In matrices.h:

 struct Matrix{
  int x; //x
  int y; //y
  int **matrix; //hold matrix values
 };

I can print out the values of a matrix using the output command:

void output(struct Matrix* matris){
int c,d;
for (c=0;c<matris->x;c++){
    for(d=0;d<matris->y;d++){
        printf(" %d ",matris->matrix[c][d]);
    }
    printf("\n");
}
printf("\n Press any key to continue...");
scanf("%d",&c);
}

This function however, fails with segmentation fault 11, where the addition takes place.

 void doAddition(struct Matrix* moutput, struct Matrix* matrixa, struct Matrix* matrixb){
  int c,d;
  for(c=0;c<matrixa->x;c++){
    for(d=0;c<matrixa->y;d++){
        moutput->matrix[c][d] = (int)matrixa->matrix[c][d] + (int)matrixb->matrix[c][d];
    }
  }
}

Any help would be greatly appreciated.

Edit:

Error log:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000100200000
0x0000000100001392 in doAddition (moutput=0x7fff5fbff800, matrixa=0x7fff5fbff820, matrixb=0x7fff5fbff810) at matrices.c:109
109 moutput->matrix[c][d] = (int)matrixa->matrix[c][d] + (int)matrixb->matrix[c][d];

Answer 1

There is typo:

This line in doAddition()

for(d = 0; c < matrixa->y; d++){

shall be

for(d = 0; d < matrixa->y; d++){

Hint : Allow youself more "spaces", this enhances readability and with this reduces the risk of misreadings.

Hint^2 : Learn how to use a debugger (for example gdb ), and use it. It'd have given you the possiblitly to inspect the variable's values around the line the program crashed.