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#include <stdio.h>#include <unistd.h>
int add(int num1,int num2){
return num1 + num2;
}
int multiply(int num1,int num2){
return num1 * num2;
}
void fork_test(int num1,int num2){
pid_t pid;
if((pid = fork()) < 0)
printf("fork error");
else if(pid == 0){
printf("son process: add two numbers.\n");
int sum = add(num1,num2);
printf("%d + %d = %d\n",num1,num2,sum);
}
else{
sleep(2);
printf("parent process: multiply two numbers.\n");
int result = multiply(num1,num2);
printf("%d * %d = %d \n",num1,num2,result);
}
}
int main() {
fork_test(15,10);
return 0;
}
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