Thread: No matching function for call to...

Hello. I have a problem when I invoke a function in the main function. The problem is "No matching function for call to that function". I don't know why it states no matching function when the function does exist. Thank you for help.

Code:

int* f1(int **a, int b, int c){
    int d[5];
    return d;
}

int main(){
    int e[5];
    int f[5][5];
    e = &f1(f, 1, 2);
}

Thank you.
There is still an error if I changed **a to a[][] as suggested.
This is my original code.
I dont't know why it states No matching function for call to findSaddlePoints.Thanks

Code:

#include <stdio.h>


int* findSaddlePoints(int **arr, int numOfRow, int numOfCol){
    int ans[numOfRow * numOfCol];
    int saddlePoint[numOfRow][numOfCol];
    int littleRow = arr[0][0];
    int maxCol = arr[0][0];
    int littleRowPosition;
    int maxColPosition;
    int m = 0;
    
    for (int i=0; i<numOfRow; i++){
        for (int j=0; j<numOfCol; j++){
            if(arr[i][j] < littleRow){
                littleRow = arr[i][j];
                littleRowPosition = j;
            }
        }
        saddlePoint[i][littleRowPosition]++;
    }
    
    for (int j=0; j<numOfCol; j++){
        for (int i=0; i<numOfRow; i++){
            if(arr[i][j] > maxColPosition){
                maxCol = arr[i][j];
                maxColPosition = i;
            }
        }
        saddlePoint[maxColPosition][j]++;
    }
    
    for(int i=0; i<numOfRow; i++){
        for(int j=0; i<numOfCol; j++){
            if(saddlePoint[i][j] == 2){
                ans[m] = saddlePoint[i][j];
                m++;
            }
        }
    }
    
    return ans;
}




int main(void){
    int arr[6][8]={{11,33,55,16,77,99,10,40},
        {29,87,65,20,45,60,90,76},{50,53,78,44,60,88,77,81},
        {46,72,71,23,88,26,15,21},{65,83,23,36,49,57,32,14},
        {40,22,34,19,54,37,26,93}};
    int answer[sizeof(arr[0])/sizeof(arr[0][0]) * sizeof(arr)/sizeof(arr[0])];
    
    answer = &findSaddlePoints(arr, sizeof(arr[0])/sizeof(arr[0][0]), sizeof(arr)/sizeof(arr[0]));
    
    return 0;
}

Originally Posted by laserlight

Show the code that you tried and the exact error message.

The error is shown below. Thank you.

Code:

#include <stdio.h>


int* findSaddlePoints(int *arr[], int numOfRow, int numOfCol){
    int ans[numOfRow * numOfCol];
    int saddlePoint[numOfRow][numOfCol];
    int littleRow = arr[0][0];
    int maxCol = arr[0][0];
    int littleRowPosition;
    int maxColPosition;
    int m = 0;
    
    for (int i=0; i<numOfRow; i++){
        for (int j=0; j<numOfCol; j++){
            if(arr[i][j] < littleRow){
                littleRow = arr[i][j];
                littleRowPosition = j;
            }
        }
        saddlePoint[i][littleRowPosition]++;
    }
    
    for (int j=0; j<numOfCol; j++){
        for (int i=0; i<numOfRow; i++){
            if(arr[i][j] > maxColPosition){
                maxCol = arr[i][j];
                maxColPosition = i;
            }
        }
        saddlePoint[maxColPosition][j]++;
    }
    
    for(int i=0; i<numOfRow; i++){
        for(int j=0; i<numOfCol; j++){
            if(saddlePoint[i][j] == 2){
                ans[m] = saddlePoint[i][j];
                m++;
            }
        }
    }
    
    return ans;
}




int main(void){
    int arr[6][8]={{11,33,55,16,77,99,10,40},
        {29,87,65,20,45,60,90,76},{50,53,78,44,60,88,77,81},
        {46,72,71,23,88,26,15,21},{65,83,23,36,49,57,32,14},
        {40,22,34,19,54,37,26,93}};
    int answer[sizeof(arr[0])/sizeof(arr[0][0]) * sizeof(arr)/sizeof(arr[0])];
    
    answer = &findSaddlePoints(arr, sizeof(arr[0])/sizeof(arr[0][0]), sizeof(arr)/sizeof(arr[0])); //error: No matching function for call to 'findSaddlePoints'
    
    return 0;
}

Compare your line 9 in your call to the function, with laserlight's example, on line 8. One char is a problem.

You could use a[][5] as the parameter in f1(), but a[][] should give you a warning or an error: Missing array size.

Originally Posted by Adak

Compare your line 9 in your call to the function, with laserlight's example, on line 8. One char is a problem.

You could use a[][5] as the parameter in f1(), but a[][] should give you a warning or an error: Missing array size.

Thank you. But error still exists in line 9 after I changed it to a[][100]

You haven't zeroed in on the wrong char on line 9 of your first example, yet.

I know you will find it - I hope so, because I am NOT telling you. Find the char that you have, (still), that laserlight's example function call line of code does NOT have.

Hunt it down!

Where is Quzah when you need him? <grin>

It's odd, but I do miss him on the forum.

You cannot assign arrays, so the return value of FindSaddlePoints, f1, whatever does not make any sense. Stop trying to do that. I suggest you look at the code in post #2 again, instead of trying to return arrays to be assigned later.

Originally Posted by Adak

Where is Quzah when you need him? <grin>

It's odd, but I do miss him on the forum.

He's around.

There are 3 char's difference between his line 9, and laserlight's line number 8.

One wonders how long it could possibly take, to find the culprit char?

OGK, and HE ain't telling, I guess. My patience is gone!

Thanks for the update, whiteflags.