main() {printf("%3s,%7.2s,%.4s,%-5.3s\n","CHINA","CHINA","CHINA","CHINA"); }结果怎么是CHINA,CH,CHIN,CHI,%3s,%7.2s,%4s,%-5.

main() {printf("%3s,%7.2s,%.4s,%-5.3s\n","CHINA","CHINA","CHINA","CHINA"); }结果怎么是CHINA,CH,CHIN,CHI,%3s,%7.2s,%4s,%-5.
main() {printf("%3s,%7.2s,%.4s,%-5.3s\n","CHINA","CHINA","CHINA","CHINA"); }
结果怎么是CHINA,CH,CHIN,CHI,%3s,%7.2s,%4s,%-5.

main() {printf("%3s,%7.2s,%.4s,%-5.3s\n","CHINA","CHINA","CHINA","CHINA"); }结果怎么是CHINA,CH,CHIN,CHI,%3s,%7.2s,%4s,%-5.
CHINA,CH,CHIN,CHI,
%3s,格式输出字符串,右对齐,超出3个长度的,就全部输出；
%7.2s,输出字符串占7个位置,有对齐,左补空格,输出2个字符；
%.4s,仅输出4个字符,占位4个位置,右对齐；
%-5.3s:输出3个字符,占位5个位置,左对齐右补空格.