Add values in same line in C programming - c

Question

I want to print multiple values on same line and then go to next line and print the same values and goes to next line and so on.
for ex:-
3 5 10
2 7 15
in C language.
#include <stdio.h>
int main()
{
int a,b,n,i,j,l;
printf("Enter total digit in a line:");
scanf("%d",&n);
printf("Enter number of lines:");
scanf("%d",&l);
for(i=1;i<=l;i++)
{
for(j=1;j<=n;j++)
{
printf("enter values for line :");
scanf("%d",&n);
}
}
}

Answer 1

For each line, read input as string with e.g. fgets, then use e.g. strtok in a loop to extract each number and use strtol to convert the numbers to integer values, and add them up.
The above solution contains of four parts, so lets split it up and do one at a time.
For each line, read input with fgets.
This is pretty simple, as all you have to do is use your outer loop and ask the user to enter numbers there, as well as read the input there as well:
for (i = 1; i <= l; i++)
{
printf("Enter numbers for line number %d: ", i);
char input[128];
fgets(input, sizeof(input), stdin);
}
Use strtok in a loop to extract each number from the input.
for (i = 1; i <= l; i++)
{
/* The code to read the input... */
char *pointer = strtok(input, " ");
while (pointer != NULL)
{
/* `pointer` is now pointing to the next space-delimited number */
/* Find the next space-delimited number */
pointer = strtok(NULL, " ");
}
}
Use strtol to convert the numbers to integer values.
{
/* `pointer` is now pointing to the next space-delimited number */
/* Convert string to number */
long value = strtol(pointer, NULL, 10);
/* Find the next space-delimited number... */
}
Finally add all values in the line.
for (i = 1; i <= l; i++)
{
long sum = 0;
/* ... */
{
long value = strtol(pointer, NULL, 10);
sum += value;
}
printf("The sum of all values on line %d is %ld\n", i, sum);
}
Putting it all together, we get this code:
for (i = 1; i <= l; i++)
{
printf("Enter numbers for line number %d: ", i);
char input[128];
fgets(input, sizeof(input), stdin);
long sum = 0;
char *pointer = strtok(input, " ");
while (pointer != NULL)
{
/* `pointer` is now pointing to the next space-delimited number */
/* Convert string to number */
long value = strtol(pointer, NULL, 10);
sum += value;
/* Find the next space-delimited number */
pointer = strtok(NULL, " ");
}
printf("The sum of all values on line %d is %ld\n", i, sum);
}
Note: The above code have no error checking. I leave that as an exercise to the readers.

Answer 2

E.g.
#include <stdio.h>
int main(void){
int n, l, i, j;
printf("Enter total digit in a line:");
scanf("%d", &n);
printf("Enter number of lines:");
scanf("%d", &l);
for(i=1;i<=l;i++){
long sum =0;
printf("enter values for line : ");
for(j=1;j<=n;j++){
int num;
scanf("%d", &num);//n : Names are colliding
sum += num;
}
printf("sum of line : %ld\n", sum);
}
return 0;
}