所有字符串轉(zhuǎn)化為數(shù)字的c語言函數(shù)？

atof(將字符串轉(zhuǎn)換成浮點(diǎn)型數(shù))

atoi(將字符串轉(zhuǎn)換成整型數(shù))

atol(將字符串轉(zhuǎn)換成長整型數(shù))

strtod(將字符串轉(zhuǎn)換成浮點(diǎn)數(shù))

strtol(將字符串轉(zhuǎn)換成長整型數(shù))

strtoul(將字符串轉(zhuǎn)換成無符號長整型數(shù))

toascii(將整型數(shù)轉(zhuǎn)換成合法的ASCII 碼字符)

toupper(將小寫字母轉(zhuǎn)換成大寫字母)

tolower(將大寫字母轉(zhuǎn)換成小寫字母)