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#include <stdio.h>
main ()
{
	int a, b, c;
	printf("Введите два целых числа\n");
	scanf("%d%d" , &a, &b);
	c = a + b;
	printf("%d+%d=%d" ,a , b , c);
	getch();
	return 0;
}
 

prog.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
 main ()
 ^~~~
prog.c: In function ‘main’:
prog.c:9:2: warning: implicit declaration of function ‘getch’; did you mean ‘getc’? [-Wimplicit-function-declaration]
  getch();
  ^~~~~
  getc
prog.c:6:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d" , &a, &b);
  ^~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /home/yWTidI/cccUldzw.o: in function `main':
prog.c:(.text.startup+0x5c): undefined reference to `getch'
collect2: error: ld returned 1 exit status

Standard output is empty