#include main() {int y,a; y=2,a=1; while(y--!=-1) {do{a*=y;a++;}while(y--);}printf(“%d,%d",a,y);}
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![#include main() {int y,a; y=2,a=1; while(y--!=-1) {do{a*=y;a++;}while(y--);}printf(“%d,%d](/uploads/image/z/1781324-44-4.jpg?t=%23include+main%28%29+%7Bint+y%2Ca%3B+y%3D2%2Ca%3D1%3B+while%28y--%21%3D-1%29+%7Bdo%7Ba%2A%3Dy%3Ba%2B%2B%3B%7Dwhile%28y--%29%3B%7Dprintf%28%E2%80%9C%25d%2C%25d%22%2Ca%2Cy%29%3B%7D)
#include main() {int y,a; y=2,a=1; while(y--!=-1) {do{a*=y;a++;}while(y--);}printf(“%d,%d",a,y);}
#include main() {int y,a; y=2,a=1; while(y--!=-1) {do{a*=y;a++;}while(y--);}
printf(“%d,%d",a,y);}
#include main() {int y,a; y=2,a=1; while(y--!=-1) {do{a*=y;a++;}while(y--);}printf(“%d,%d",a,y);}
while(y-- != -1)//这句执行后y = 1
{
do{
a *= y;//a = 1;
a++;//a= 2
}while(y--);//这句执行后y = 0,do里面在执行一遍,即a = 1;推出do...while,来到外层while循环
后此时y = -1;外层循环不进入,但是y--还是要执行的故此时y = -2;a = 1
}
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