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#include <stdio.h>
#include <omp.h>
int main(int argc, char *argv[])
{
printf("Печать 1\n");
omp_set_num_threads(3);
#pragma omp parallel
{
printf("Печать 2\n");
}
#pragma omp parallel num_threads(2)
{
printf("Печать 3\n");
}
printf("Печать 4\n");
}
 

prog.c: In function ‘main’:
prog.c:7:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
 #pragma omp parallel
 
prog.c:11:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
 #pragma omp parallel num_threads(2)
 
/home/7RJqES/cc1Ch22v.o: In function `main':
prog.c:(.text.startup+0x16): undefined reference to `omp_set_num_threads'
collect2: error: ld returned 1 exit status

Standard output is empty