Eroare de compilare: user.cpp:1:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){int a,b;fscanf(fopen("adunare.in","r"),"%d%d",&a,&b);fprintf(fopen("adunare.out","w"),"w","%d",a+b);} ^ user.cpp: In function ‘int main()’: user.cpp:1:45: error: ‘fopen’ was not declared in this scope main(){int a,b;fscanf(fopen("adunare.in","r"),"%d%d",&a,&b);fprintf(fopen("adunare.out","w"),"w","%d",a+b);} ^ user.cpp:1:59: error: ‘fscanf’ was not declared in this scope main(){int a,b;fscanf(fopen("adunare.in","r"),"%d%d",&a,&b);fprintf(fopen("adunare.out","w"),"w","%d",a+b);} ^ user.cpp:1:106: error: ‘fprintf’ was not declared in this scope main(){int a,b;fscanf(fopen("adunare.in","r"),"%d%d",&a,&b);fprintf(fopen("adunare.out","w"),"w","%d",a+b);} ^