例嵌套调用 qianI( int x, int y) qian2(int x, int y f c,S,t; freturn(x*y); s=X+y; tx-y; c=qian2(S, t); main return(c); fint a=1, b=2,c; printf("c=%d\n",c); C=2*qian(a, b), printf(c=%d\n",c);例 嵌套调用： qian1( int x, int y ) { int c, s, t ; s=x+y; t=x-y; c=qian2(s, t); return (c); printf("c=%d\n", c); } qian2( int x , int y ) { return ( x * y ) ; } main( ) { int a=1, b=2, c ; c=2*qian1(a, b); printf("c = %d\n", c); }