Input of multiple integers at once for dynamic array in C-CodePudding

My input consists of a sequence of integers, that need to be saved in a dynamic array. The number of integers is the first integer of the sequence. For example: 3 23 7 -12 or 5 -777 3 56 14 7

The sequence is ONE input.

How can i scan such an input?

For scanf("%i %i %i ...",)i need to know the amount of integers in advance, which i dont.

CodePudding user response：

Use multiple scanf calls. First read the count, then read the values in a loop.

int count;
scanf("%i", &count);
int values[count];
for (int i=0; i<count; i  ) {
    scanf("%i", &values[i]);
}

Note that this doesn't include error checking for invalid values.

CodePudding user response：

You can do it with a do-while loop:

int status = 0;
do {
    status = scanf("%d", &placeToStoreVariablesAt);
} while(status);

Note that scanf() returns number of elements of correct type entered. If a char is entered, status becomes 0 and therefore program exits loop.