C bootcamp · Lab 02

Sum two numbers

easyInput8 minLesson: User Input

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QuestionHint and solution stay closed until you open them

Read two integers from stdin and print their sum.

Use scanf to read the numbers. Print only the sum, then a newline.

Input. Two integers a and b, separated by space or newline.

Output. One integer: a + b

Constraints

  • -1000 ≤ a, b ≤ 1000

Examples

Example 1
Input
3 5
Output
8
Example 2 — Values may sit on two lines.
Input
10
-4
Output
6
Hint
  1. Declare two ints, then scanf("%d %d", &a, &b);
  2. Remember the & — scanf needs the address of each variable.
Show correct code

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#include <stdio.h>

int main(void) {
  int a, b;
  if (scanf("%d %d", &a, &b) == 2) {
    printf("%d\n", a + b);
  }
  return 0;
}
main.cC17 · gcc · Ctrl + Enter runs
ResultIdle
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